Yes, CRDE. Maybe I can help you. the requirements for Catalina are , for your macBook, one from 2015,2016 or 2017. Lion is not available from the App store. If you HAD Lion on there, reboot, hold down Apple(cloverleaf/command)+R keys together and it should reboot from the recovery partition, if you had one. If not, try Internet recovery. plug an ethernet cable into the MacBook Pro, and hold down Shift, Option, Apple, R. This will try to get you the most compatible OS for your MacBook that it can. You'll know you are successful when you see a spinning globe on the screen and a progress bar. If you "bought" It already from the App store, it should be there under Purchases, as long as your Mac is authorized to do so. There is a way to install Catalina on it, but seeing as how it's not official, we can't talk about it here
good luck
JB