Bob, I didn't say I liked doing interiors, only, my customers tend to be more into how well they look. Honestly, when somebody tells me that they will do the inside, I am happy.
A good wash, rinse, clay, rinse and you will be set for polishing. The more you do, the easier it gets. Don't be afraid to experiment with different products,and pads. Do a couple 2x2 sections we and see whawt works best. Sometimes I have to go back to the cabinets and pull out several things and try them. Had a G35 that finished down with Uno everywhere but the top, only Menzerna FFII would work