Amazfit Watch faces

Hi all,
I just purchased a new Bip watch, I see there's a lot of tools/apps available and I wondering is someone can give me a quick run down of what I would need to allow me to tweak/customize as much as I want too.
I'm currently on android and coming from a moto gen 2.
Other than the Mi app, so I need or are there any other apps I should install on my phone?
Also anything suggestions/tips for what I should do first once I receive my new watch?

thanks for the advice in advance.

I'm new too, I also installed notify & fitness from playstore, you can tweak loads of settings via this app, more than mifit. Also you can install all watch faces from here from within the app as well.