Our bodies are all asymmetrical to some degree, and some a lot more than others. Lengthening our tendons and muscles is a necessity to alleviate other muscles shortening and therefore preventing long term damage that more than often ends up in an operation that could have been prevented.
Get educated and follow a few stretches that you have learnt and hold them for 30 seconds at a time. Do not stretch when your muscles are cold and do ask questions when you have an injury so you can rectify something you may be doing incorrectly.
As I have stressed, knowledge is the tool and application is the spadework. Start today with what is going to be a base to work from and never let up!!!