Not 100% sure if you're after good crags for beginner seconds or leaders, which would be quite different, but assuming you mean the latter, a few thoughts as a relatively newer leader myself.
- Agree with Windgather for all the reasons others have said. It can get busy with groups though.
- I quite like Castle Naze. A couple of nice VDs (Sheltered Crack, Zig-a-Zag-a) and harder stuff as well if you're going with a partner who wants to mix it up. Only problem is very little parking and not much else nearby other than Windgather.
- I share scepticism about Birchen. Both from routes that have horrible polished starts, and/or reachy - three times I've seconded Emma's Dilemma; never got it clean! I'm 5'3" - and false, sloping summits that you can't see from the bottom or in the book (Yoho Crack, backed off leading). It does have lower grade routes but they're not beginner leader amiable imo.
- I would also avoid things like the one row of very short, easy routes at Bamford that turn out to have no belays whatsoever, or the first routes at Burbage - I don't think Burbage cracks are that easy if you're a newer climber! Some of the Burbage Diffs are stiff too (Sentinel Crack big layback that's negligibly protected...). There are ofc a few low grade routes there though.
- I think the Roaches is overrated for beginners personally - too little at VD (mostly the odd Diff or HVD/S) and several listed as hard for the short so no good for me!
- Gamma at Froggatt is lovely and friendly; Trapeze is worlds harder for being the same grade. Heather Wall also nice. I've noticed there are always a lot of boulderers around Gamma, though, so it can be hard to get on.
- The odd route at all of these, ofc, plus Rivelin (tree belays), Wharncliffe.
- To be honest though, I would probably just pick a nice bit of Stanage, as much as that's an unimaginative choice; dependent on your grade, there are a few Mods at Away From It All, some lower grade stuff around Fate and Youth, and plenty of Diffs or VDs elsewhere - eg Anatomy is a friendly VD at Popular; Mississippi Chimney has a hard start then eases, so you get the feeling of having climbed some height.
Good luck. If you're after inspiration for extremely easy, boring, friendly, short routes to start out on, I can share my logbook...
Post edited at 01:37