It depends on the wormhole class. What you want are C1, C2, or C3 wormholes - these contain the same PVE relic sites that exist in null sec.
You will still get sleeper PVE relics (forgotten frontiers etc.) but you’ll find a mix of pirate and sleeper relics there. The Sansha sites (ruined sansh monuments etc.) are usually worth the most, but you’ll find all types there.
Don’t waste your time on Data sites. A sansha relic will pull you 60-90mil, a Data site will pull you 1-10mil. You will make more ISK by saving your time and skipping them to look for more relics.
EDIT: P.S. Swap your heron for a magnate, it has four low slots for warp core stabs. I HATE warp core stabs - but as a new player, you’ll find they might save you. Most wormholers use a dual scram fit to gank explorers - the magnate is the only exploration frigate with enough lows to manage +4 warp core strength, so they’ll require a faction scram to hold you down. Have fun o7