How to use tret effective ?

[Linus145.44]

I use tret like 10 or 11 days . started only on my forehead and chin on my chin my skin was peeling but not the next day like 2 days later i think the pimples were gone for a short term but now there are back . i started it using it on my nose and a little on my cheecks for 2 days in a row nothing happened now my skin on my nose and my cheecks just burns and is red . my skin is kinda sensetive tho . but it doenst peel like on my chin .
I think im doing something wrong i know that it takes like 12 weeks to see real results but i dont know if my symtoms are normal .
Im using illyion ceramid gel , cerave cleanser and some spf from my local store for like 5 euros so not the best one with shity inggredients and i dont know if spending 20 euros on a good sensitive spf is worth it and if the illyion ceramid is maybe to thick for my skin ? because i can only see the peeling when my skin is completely dry . i think in the nexrt day my nose will start to peel a little .
should i use azela acid with it ? but i can get a little dose of it . how often should i use it ? beginner btw like 3 or 4 times ? and why does the effect comes later and why does my skin on the cheecks is more sensitive . can i aplly tret on senstive spots too ?
Any good night routine or tipps for me ?