Lay flat on your back on the floor with both shoulders touching the floor.
Now lift your right leg and, rotating your bottom half,
lean that leg (bent knee) across to the left side.
Keep your right shoulder in touch with the floor.
Hold for 30 seconds, before doing the same with the left leg.
Repeat this just 5 times for each leg. This exercise will improve your torso rotation range.
If you can use the next 3 months to improve your range of motion,
then when you get to next make that golf swing,
an improved range of motion will help you make a better swing.
More accuracy. More consistency. More fun.