I don't have Telegram, the guide that you point is one of the one I use. A really good site about LLCs is
Learn How to Form an LLC (step-by-step) | LLC University®, they have guides for almost everything (no taxes guides but they have everything else).
Another company to create the business is northwestregisteredagent.com which is the one I use, it does not offer the accounting but is fast and cheap (at least that was my case). I created the
Wyoming LLC with them and one year of registered agent for only $39 + the state fees ($100), the first year was only $139 but after one year then the registered agent services goes up to $129 which will be $229 counting the state fee. They don't get you the EIN either but that one is easy to get from the
IRS. I think they offer good prices for a basic service, my LLC was created and it was on the WY systems in less than 24hrs.
The only thing I can complain is about their web dashboard which is not the best, they updated it last month and now is a little better but still not the best.