Am I washing my car right?

Hello, I’m Sam and now I have my first own car! The previous owner probably doesn’t care about the optical care. I doubt that he has ever seen a laundry at all, last year. I want to clean this now in the truest sense of the word. Unfortunately, it is not done with “times just” because all the small hidden edges in the intermediate rooms of the door and the trunk are completely dirty. For this I ordered the standard beginner stuff. My first question:Do I need Snow Foam and a foam sprayer or does it also the lance foam in the SB washbox? Are there significant differences or does it end up with the same? My second question: Unfortunately, the carpet is completely dirty with dirt, since the previous owner had no carpets in it. Now the fixed is dirty.Do I really have to take the money in my hand and buy a spray vacuum cleaner (as in the Youtube videos), or is it enough if I take the Teppi My third question. Does my approach fit? I have never had a car before and have tried to “train” something via YouTube. Does this fit? My approach looks like this: Outside: 1. Insect remover spraying on the bumper 2. Remove coarse dirt with spray lance and clear water 3. Foam on it 4. Clean the car outside thoroughly with microfiber glove (and the two bucket method) 5. Foam 6. Solve the stubborn dirt with the brush 7. Pass over with the lance outside and dry with microfibre cloth 8. Clean the “critical places” with microfibre glove 9. Run over water, lance does not go into the door between rooms etc. Inside : 1. suck out car 2.Synthetic spray on plastic surfaces 3. Work persistent places with brush 4. Wipe over with wet microfiber cloth 5. With dry Dry microfibre cloth 6. Spray seats with upholstery cleaner 7. Rub with brush 8. Spray with SB wet suction cups 9. Spray in carpets with upholstery cleaner 10. Rub with brush 11. Clean with SB wet suction cups 12. Glass/mirror as you know it from home I thank all who will help me and hope to make some interesting contacts Your Sam! P.s.: I threw it into the product category because I want to know if I have certain products need. I hope this fits like this