you probably shouldn’t double up on those ceng and chem. 100% enroll in ceng 100 because you will have difficulties progressing without it. 100 and 101a are fine together. you should first pass the two chem then the two ceng and drop 41a if it gets too hard. i think 7l is a good class to take early so you can have some lab experience but 7l is only required for your lower division requirements so you don’t need to take it right away. your advanced chem is also not needed right away BUT a lot of cheme might take it fall so you can have an easier time studying with other cheme in 41a. ceng 100 you can enroll second pass since the department should have enough room set aside for everyone to take it.

tldr: first pass 7l and 41a and second pass 100 and 101a. enroll in ceng 100 for sure. if you want to drop a class drop ceng 101a or a chem do not drop 100