Hmmm . . . in my direct experience, it’s not a great idea when creating a new business to only perform research within a single source.
Of course, the same principle holds true for training/certifications, etc.
Yes, you will have lower start-up expenses, but the breadth & depth of the knowledge you’ll gain in the process will definitively serve you well in the long run. So, if you’ve researched the potential market within your region and there’s not already a saturation of Professional Signing Agents [PSAs], then yes definitely proceed with the training programs of your choice.
======
This is what is meant when we reference that “it’s a very small world” in this business sector.
Someone new can make an inadvertent (or simple) error on their initial few signings and VOILA! There name is out for publication between & among lenders, title/escrow companies [T/ECs], etc. and are avoided for possible Signing Orders.
Another reason why we advocate for ensuring you receive some professional, reliable, & trustworthy training (not YouTube) prior to accepting your initial Signing Order. Just looking out for your successful Business Launch!
======
A few things to consider:
What is your background?
Do you have experience in Real Estate?
Do you have experience in Mortgage Lending?
Do you have experience in Banking?
Etc. ad nauseam . . . => just know that you’re launching a business and the onus is upon you to create the best foundation possible from the onset. See this thread for additional information:
Most newbies find they’re ill-prepared if they’ve only successfully completed the NNA certification as a PSA. See my notes about this topic within the following thread:
======
My personal experience:
When I initially started performing this work, I successfully completed MULTIPLE training/certification programs including Notary2Pro & NNA and many others. I have extensive experience in skill sets that require certification and recurrent evaluation tests; i.e., I’ve maintained my Project Management Professional [PMP] certification for more than 20 years. So, I understand what it usually entails and the elements that should be included within a comprehensive training program.
Regarding the NNA training specifically, it’s lacking across multiple topics & categories. Many NNA “graduates” choose to take additional training courses elsewhere, because they sense they’re insufficiently prepared. Their primer has errors throughout. Their hotline is less than reliable for accurate responses.
In my experience with undergoing the multiple training programs for certified notary signing agent [CNSA] certification, hands-down without question, Carol Ray’s Notary2Pro training programs are optimum in this industry. I’ve successfully completed ALL of the multiple training/certification programs that Carol offers through her company Notary2Pro. Her programs are thorough & detailed. These also prepare the business owner to operate a business. In addition, she offers Mentoring services. I found those to be excellent & INVALUABLE when I was initially starting out in this business sector. The prices are surprisingly reasonable. 
I’ve professionally compared the training/certification programs available at Notary2Pro with the others I’ve successfully completed. The ONLY training/certification program I recommend is Notary2Pro.
A list of companies that hire Notary2Pro graduates (with minimal or no experience) is provided to successful course graduates. => This list is pure GOLD! Study up, refresh your notes, & let Carol know when your initial few signings are scheduled. She is a wonderful mentor & can be on standby in case you encounter difficulties or have questions during your first few signings. She’s the Best! Her support will help you Build your Confidence in providing this service. 
In addition, Notary2Pro works diligently to keep this list up-to-date regarding vetting and viability. As we all know, some reliable clients can encounter financial difficulties and that, in turn, can negatively impact CNSAs directly.
Of course, your best bet would be to visit their website at https://www.notary2pro.com, research, and make the choices appropriate for your situation. The training programs by Carol Ray are comprehensive & thorough. 
P.S. I receive no compensation or remuneration of any type or kind as a result of my first-hand experiential review above.
P.P.S. Unfortunately, Carol recently passed from our earthly plane. I hope she Rests In Peace. I’m grateful to have made her acquaintance and studied under her tutelage.
.
.
.
