I applied for a transfer from chemical eng. to electrical eng. which is going to get reviewed in August. Should I still make my course selection for chem. eng tonight?

Probably a good idea, although you'll be guaranteed required courses.

Definitely sign up for electives.

Yup I would. better safe than sorry

for going into second year eng, what electives can we choose from? like were we given a list or something?

You should definitely read over the Undergrad Calendar. Just select your program here and it shows what the requirements are. For electives if its complementary electives the link will be there but if its department specific like a technical elective then you'll have to do some searching yourself under your department website.