That's a great entry-level gig. It's better that most any piston job at your level.

It will certainly give you a leg up getting hired by a regional but it will not replace the regionals stepping stone if your goal is airlines.

What it could do for you is allow you to break into the corporate track if you decide to go that route. At your level, you would need to focus on corporate TPIC opportunities....get your 1000 and maybe a type or two and then you're off to the races. Of course you'll network at every opportunity.

But even success in the corporate track will not guarantee success with major airlines...some of them hire a few corporate folks but you'll be competing with about 10,000 RJ captains with more relevant experience and more TPIC.

Major airlines (especially the better ones) prefer TPIC 121 glass turbojet experience in roughly that order. If all you have is 91 SIC in a lear, that's not going to cut it. Even if you can move to PIC in that gig, at 200 hours/year you would need 5-8 years to even get competitive TPIC numbers, and even then airlines would B-list you because you don't have 121 experience.

You need to decide which track you want to pursue. If you're all about QOL and you like your current pay and QOL you could stay in your lear gig until it runs dry. If you want to progress in the corporate world you need to look for TPIC and type opportunities. If you really want airlines, the region are probably the best bet, although it is possible to switch tracks from corp to 121.