There is no easy, fast way into this field....A heat press is a heat press... there is not a separate on for transfers and sublimation...one press does it just fine...you need at least 400 deg F and an adjustable time/pressure depending on the material and process
To start you should read all the info on getting started that is already posted on the forum..
by the way...don't over extend...fact is a large percentage who attempt this as a business fail within 2 years or less ...or when ever the money runs out...which ever is first
welcome to a fun way to make $$...you just have to make sure of what you want to do and read...read and read...