Need help customizing checkout page/form

I need to do one of three things:

1. Change the words in the membership level text box. Right now it says, “The price for membership is $$ now and then $$ per month.” How can I change this?

2. Left-align all the titles of the fields. Right now they’re a littie jumbled.

3. Remove the initial fee for some levels. What if there is no initial/set-up fee?

I know this has to do with editing the CSS or PHP or something but any help would be greatly appreciated!

Thanks

https://ww.wp.xz.cn/plugins/paid-memberships-pro/