What should i do if I have a firm in the US ? what service option would fit me, what it contains, what are the annual costs and if you provide some training?

I have a firm in the united states, LLC - and I am the sole owner for an Amazon FBA business.

Tell me, please, what service option would fit me, what it contains, what are the annual costs and if you provide some training. I would like to be able to file my own tax return for my LLC.