Looks like you're new in this space. I would recommend that you acquire some basic knowledge about crypto because if you move your funds away from exchanges and don't know what you actually doing is very very ver risky! Over the years there have been quite a few here who have lost their funds in different ways.
1. Your XRP's are now at wallet on coinbase if you want to move them somewhere you need another wallet (If i understand right you don't want to store the XRP on your own and you want to trade it somewhere awailable)
1.1 in this case ou first needto find another exchange where's traing possible for US (because of the sec lawsuite there are not much at this time)
2. If you found a new exchange search for ''deposit funds'' and then there shut be an ''deposit XRP adress and sometimes a destination tag''.
3. send the XRP from coinbase to the new exchange
Usually there is an instruction on every exhange on how to proceed. Be warned to take every step carefully. As I said, many have already lost their money. If you have concerns, keep your hands off it and always read the subject first.
And be warned of scamers