How to set up Paypal and which SDEK module is better to choose?

Question

MODX

Hello MODx experts!
There is an online store on MODx Revo using MiniShop2
The essence of the question is this:
1. You need to set up PayPal payments, these payments are included and the types of delivery for them are also included.
The stupor arose in the core / paypal settings themselves, what username and URL to enter there, what kind of PayPal account should I have and whether it should be an account for a company or a regular Paypal user, I apologize that the question is somewhat silly, but I googled and could not find relevant information or tutorial on these settings.
2. We need a SDEK delivery module, I found one for 990 rubles
https://modstore.pro/packages/integration/mscdek
Maybe someone used and knows alternatives or more convenient options? Or is it better to stop there?
Thanks for the help!