Don't come to SkyWest then. 175 = long reserve, very little flying.

This is why everyone's transition bids are being bypassed, gotta hold all those training slots for newhires. Dangling that E-jet carrot is the only way they can get a lot of of these guys in the door.

Well I've been here for a little over two years so my couple months on reserve doesn't really tell much for a new hire today. I'm averaging 52 hours a month and that's partly because in Jan and Feb I was buddy bidding a check airman friend of mine, so for those months I flew only about 40 hours. The goal was to get displaced and pick up additional flying to make extra money but that's been impossible since there's zero open time. Since not flying got boring I started bidding normally again and I'm still getting displaced about once a month so there's no way around it... new hires need IOE or consolidation hours and block hours are down for this time of the year. Maybe once summer rolls around things will change but there's no way any of us can tell you definitively what to expect. The only thing that looks to stay constant is the movement on the CRJ and short reserve times, but that could change tomorrow. PM me if you have anymore questions.

This is pretty true.... There's people here approaching their 1 year anniversary with less than 200 hours in the plane.

When it comes time to make the move to a legacy/LCC, whether you flew a CRJ or 175 won't matter in getting hired. What will for your sake is the QOL you had while you were at the regionals.
Don't choose a company solely for an aircraft. It might sound good now, but you will regret it down the road.

Wise words indeed. It's impossible to understand how true this is until you've been doing this job a while...

Is ORD a 175-only base? Or is there CRJ as well?

Both. There is no 175 only base here.

How junior would CRJ FO in ORD be?

You'll be there whenever you want it.