Bidding game (simple SAYC)
A good general principle is that when you have an opening hand and partner opens, you should get to a game.

Partner has advertised a 6+-card diamond suit (some people may rebid 2D with 2353 shape on this auction, but I prefer 2H) and has limited their values (with a good 17-count or better, partner would have a different bid). So you can see that you (probably) don't have an 8-card fit. You don't describe your hand completely, but if you have half a spade stopper or better, 3NT seems like the right place to play. If partner rebids 4D, this is game forcing and suggests some slam interest; it cannot be passed.

If your spades are bad, probably your best rebid is your 4-card club suit; if partner has a spade holding they can rebid 3NT. Rebidding your hearts is not very attractive because you only have 5 of them.