I have registered a (Wyoming) business using Firstbase, and it was a breeze. Mind you, I am also an investor in the Calm Company Fund that has funded Firstbase. I wanted a US business, and now I have one.
Why did I want it? I wanted to make sure my liability was covered. It makes it much easier to invoice enterprise customers, build business partnerships, and eventually hire people. It also comes with a lot of little goodies, from free AWS credits to a Mercury bank account — and you need that stuff when you start a new business, anyway.
For a B2B business, I highly recommend creating a business entity.
In fact, when I co-founded FeedbackPanda back in 2017 with my partner Danielle, I made sure we had a business entity (German GmbH, an LLC equivalent) before we got paid by our first customer. I wanted our business books to be independent of our personal financial records. I've seen too many people running into audit problems with those hilariously small first few months' worth of revenue. Strong separation from the start.
Having a company like this also helps you work on new business ideas. The "studio model" may have originated in the VC world, but it works for bootstrappers who are building a portfolio of small bets as well. Build your business from within your Delaware LLC, and if it flops, build another one from within the same company. No need to go through the formation of a business all the time.
Just to clarify: depending on where you reside, you might want to consult a local lawyer or tax advisor. Your local regulations might make this harder depending on what they look like.
I have not done anything with trademarks for myself. I don't have any advice here on this issue, but I'd gladly look into this for you. Reach out to me on Twitter, and we'll ask my audience there together.