Need Dropshipping Advice!!!

Hello Guys ! I am planning to start a dropshipping journey soon! I want to know, from your experience what method do you prefer:

1.Shopify + Oberloo

2.Wordpress + AliDropship Plugin

I mention that I live in Europe and I want to target US customers.

Also, I`d appreciate if someone could explain me the payment process more detailed, please.

Do I need to register a LLC in my country or US?

Do I interact with customers money directly or there are some gateaways?

I want to thank…

Need Dropshipping Advice!!!