Shopify - the basics and Info

Just need someone to speak to me about shopify - the do's and don'ts etc - and basic setup and build working with a couple of its templates (can I build two versions using 2 separate templates?) , with future thoughts to think about -How can I then change from shopify to a Wordpress at a later stage - possible? - please do give me a Zoom link - as i will need to speak to you. Thanks