Nice to meet you all

Bought my E30 around 15 years ago when I was 18, which I converted to a 2.5 engine.
Has spent more time off the road than on it over the years but looking to get her back up and running.
Unfortunately I have an issue with it at the moment as it used to get stuck in reverse when I reversed out of my drive until I switched it off and took it out of gear until one day I decided not switch it off but force it, heard something click and now the gear stick is wobbly and the car is stuck in reverse

Any ideas on what I’ve done and if it can be repaired or needs to be replaced?