Could someone provide advice/feedback on my (semi)daily exercise routine?

I try to do these exercises daily but sometimes I get lazy and deviate a bit from my usual. It’s typically the squats because my knees make a kind of cracking sound; that’s also why I’ve been total neglecting cardio. In general I am trying to build up overall strength with the 15lbs and 40lbs weights and chin up bar I have.

Here’s my average stats for this month:

Lateral Raises (15 lbs) 50 - 100 reps

Curls (15 lbs) 100 - 300 reps

Curls (40 lbs) 100 - 350 reps

Squats (if I do them) 100 reps

Goblin Squats (if I do them) (15 lbs) 100 reps

Push Ups 100 reps

Sit Ups 100 - 250 reps

Chin Ups 50 reps

I think I may be doing too many reps at this point and need to acquire heavier weights.

Is breaking up things like my curls to three times a day (100/100/100) significantly less beneficial?

Are there some exercises I should add on top of this? Any suggestions for low impact knee exercises would be great.

Are these alright stats so far? I’ve only really been going hard after someone close to me got hate crimed around when COVID first started taking off.

I know there are some guides out there for beginners I could likely look at but I feel like I am in a bit of a weird grey zone and with a tiny home gym I am not too sure how to proceed.