What daily exercises do you suggest for trigger finger?

Yes and No. Surgery is the truly option with the best success rate. Steroid injections help but are temporary, weaken the joint and tissue and bone, and become less effective over time. Discuss the best options, even occupational hand therapy, with your hand surgeon.
Try injections. I have not found stretching exercises work well for trigger fingers. 60%-70% of patients get complete relief of their symptoms with injections of cortisone. If you have 3 or fewer injections into a single area spaced out at least a month apart it is very safe with few to no side effects. If the injections don't work i would recommend a small surgery called a trigger finger release.