Do the form 1 online. Pay your money and upload your photos.
Then download your coversheet and mail your prints.
Should take less than a month.
Get fingerprint cards before you start
They are available on amazon fairly fast
From atf they are free but take a month or so to receive
Fingerprint cards can be ordered from the ATF with the correct ORI on them for FREE. You can buy an ink pad at Walmart or your local office supply and do them yourself. Order more than you need so that you can practice or have spares for later.