Only pay for a trainer if you're afraid of not being able to commit to an exercise routine, OP. And there's no shame in that.
Otherwise, there's all the free stuff you need online, in Youtube videos, to help you strength-train so that you regain a little bounce.
Please understand that you will not go back to your old body. Skin loses its elasticity over time, so certain parts will sag more than before. But your body will be perkier, for lack of a better word, if your muscles can hold up fatty parts of your body