After buying XMR from openmonero do we transfer that to a different wallet to a different XMR and shop from there? Which steps should I follow I'm a newbie.
Cash by mail with a trusted trader.
There are many platforms out there, If I were you I would prioritize finding a local trading group (bitcoin ones are everywhere, and also like XMR and LTC) and trade with them at low fees.
Last step is to swap, if you need to, and you are good to go.