DBA is filed with the county. no help needed, just call the county clerk (they call it an assumed name), my county has the form online to fill out and take in, they notarize then file $14.
so IN THAT county you can be Joe Blow doing business as XYZ. you can't be Joe Blow dba XYZinc. as inc implies that your incorporated, and you are not, just a sole prop.
now, if you going to make money, you need to talk to a CPA, not a layer (or CPA and a lawyer depending on what you are doing)
ive done lots if you need help.
83 CJ-8 scrambler
Locked and Twin-sticked
35's, fenders cut
leaks just about everything