
What chapter should i be reading in the novel to continue this

Novel without extras is 113 chapters. With extras is another 10 or so.
Once you get into the pace it's a fast read. You have the advantage of knowing characters by names (something I struggled).
Try the authors other two novels. Scum Villain Self Saving system and Heavens official Blessing. HOB is closer to MDZS but it's longer and has less intense BL (it's like shounen ai).
I only recently got into novels myself thanks to MDZS
Similar manga recommendations?
The part where the seme is a bit dominant and have his eyes only at the uke is too cute.
If you remember.. the seme wasn't that good here(1.he kissed some other girl in the first few chapters 2. He didn't ask for Consent and that was rude)
first point isn't really "bad". he himself is originally straight, he don't know uke's feeling and boys that age is starting to feel attracted to girl so the kiss with the girl can slide BUT I agree with the second point it's too dubious