Possible new routine

I currently only exfoliate twice a week with a Pha because I’m relatively new to it and I was afraid of irritation but I’m noticing it’s not very effective for my issues.

I have combination skin and I wanted to use this Paula’s choice BHA toner on my oily areas once a week to minimize clogged pores.

I also have hyperpigmentation and so I wanted to use the lactic acid on my dryer areas because I’ve read it’s the most effective for this problem.

However the problem is I also have some spots around my nose and I’m afraid to use the lactic acid and BHA on this area.

Should I use an AHA/BHA product all over my face instead ?

Additionally I would like to integrate azelaic acid into my routine but I don’t know when I should use it. Is it ok to use with retinol and the skinceuticals discoloration defense serum ? Is it even useful for sun spots ?

Usually I don’t use the serum on the day I’m using the retinol because I’m afraid of irritation. Is that ok ?

Thanks a lot