If you shoot "off the shelf" you'll need arrows fletched with feathers. If you choose to use an arrow rest that is compatible with plastic vanes then your arrows can use the vanes.
Shooting arrows with plastic vanes, off the shelf, will throw the arrows sideways and angled up or down towards the target.
Overweight bow is a problem. I'd start with something like a Samick Journey in 25 lb weight, even if you can draw more. Get heavier draw weight limbs as your shooting progresses.
Lower draw weight makes it easier to torque the string in pitch, roll and yaw, all of these will throw a shot. If you master the technique of accuracy with low draw weight and short fletching, then higher draw weight with longer fletching is easier because you will have good form and release.
Use a tab or glove that gives you good feel of the string, this will help you get a good and consistent release.
Edit to add, Journey over Sage because the Journey is longer and thus has less angle of the string at the tab or glove. Less angle reduces finger pinch and has less chance of string torqueing in roll, pitch or yaw. Longer bow also has less chance or bow torqueing at the bow hold hand. Open the bow hand, cradle the bow, instead of gripping the bow, gripping can torque the bow in roll, pitch and yaw. Yep, just like the string.
Edit again, compound bows are usually shorter, so archers use a release to prevent string torqueing. It, a release, works!