Agree with Bjorn, pick one bow and arrow setup to start, and it might help if it is the lightest bow.
When your getting started, it is easier to develop a correct style and form without to much effort, which is why a light bow is good to start with. Also, if you shoot at 10 ft. into a bale or backstop without a target, dots or animals. If you have one of the mfgr targets with dots or animals, cover it with a burlap sack.
Keep in mind, changing your form may produce a different result. It may be easier to learn shooting split finger and easier to tune.
Try to follow the manufacturer's recommendations for string height and nocking point if available.
If not known, start about 7.5" brace ht. with a recurve, and 1/4" high nocking point. If you have a flemish string, shoot arrows at 10 ft. and raise the string about 5 twists and shoot again, The bow may sound better at a particular height. The range in brace height may be less than 1.0 inch, (as an example 7.0 to 8.0"). Stay within the range as suggested by the mfgr.
While your doing this, shooting should be done without a target.
If the elbow hurts, stop and ice it. I have been shooting a lifetime, and have never had a sensitive elbow, so it is difficult to understand, what might cause such a problem. I would suggest, as others before me, try to find an experienced person (preferrably an instructor)to watch you shoot. Good luck and let us know how things are going.