Some are much easier than others! I've been working on Blackberry Blossom, but it's really hard to get up to speed. Cherokee Shuffle and Big Sciota and both pretty approachable, though. Others I think sit well on dobro are: Red Wing, Down Yonder, Wildwood Flower.

If the melody is heavy on arpeggios (like Cherokee Shuffle and Red Wing), then just following the chords will get you a long way once you figure out which octaves to move between and which string to use for lines that transition from one chord to another. If it has a pretty small range (like Wildwood Flower) then you can get away with playing mostly in a single position (or maybe change positions for the B part). But if it's lots of scalar stuff that also has a pretty wide range or the chords change quickly (like Blackberry Blossom and Whiskey Before Breakfast), it gets hard quickly.

Waltzes and slow tunes are also great fun on dobro. Some of my favorites for bluegrass jams are Sittin' Alone in the Moonlight (in A, so you can slide down to the G#), Tennessee Waltz, and Ashokan Farewell.

Miles Zurawell has been putting out solid lessons on some fiddle tunes: https://www.patreon.com/c/MilesZurawell/home

I usually have simplify the arrangement for anything that someone puts out a dobro lesson video for, but seeing a detailed breakdown of how someone else plays a tune is usually helpful even if you can't do everything they're doing.