Here's a trick for hand feeding birds. It tends to work with the bolder species such as jays, titmice, and chickadees. If you hold your hand high over your head, with seeds in your hand held level, they seem bolder to approach, for whatever reason. (Maybe they think that you can't see them there, or that you can't reach them on your hand over your head!). Or you can sit very still. We have a porthole in our window at the feeder, which I can close when it's not in use, so in cold weather, I can stay warm. Anyway, when they get used to feeding from your hand in the "special" way, some of the bolder and smarter ones will continue to feed as you move your hand to a more comfortable position, step by step, each time they come to feed.
Don't forget that spring is "starving time" for the birds, so that now is the most beneficial time to keep your bird feeder topped off daily.