Tex, easiest one to start, would be one in yer Teenager's hands. I know they make a sort of drill powered Jump Start for sum Weedeaters, dunno if they make same for sum chainsaws
You just might look at the STIHL 018 Saws... Even my wife can start hers, without issues, as they have an "Easy Start" design that makes them very easy to use. We own a few different Models of STIHL Saws, around here. I have an 032, with a 30" Bar, that I have owned and used for 35 years, that is still as operational today, as it was when I bought it. I use it Year round for Trail Clearing, and Firewood Logging, and Momma uses her 018 for Limbing and Brush Clearing. We keep a dozen extra chains, for each, in the Tool Shed, and a couple in the back of the Rhino, for when the Operational Chains get dull. Once a year I get out the Chain Grinder/Sharpener, and go thru the Chains, to refurbish them. Any that are to worn to sharpen, are tossed and I make up a replacement from the Spool of New Chain, from Oregon Chain. I have a Chain Breaker/Maker mounted on the same bench as the Sharpener. If you live out where I live, a Good Saw is a REQUIREMENT.... And STIHL is ALWAYS the Alaskan Loggers Saw of choice.... .... YMMV.....
Stihl 180 is perfect for most of my needs. My friend got the easy start option on accident... Hates it. Already on his 3rd warranty return since it keeps breaking. The standard start model is very easy to start.
Tex, I deffinatly recomend the stihl or the huskarvania ... I dont know how much u plan on using it or for what but if you do deside on the husy beware there are to different models the home owner version sold at sears and then the real deal sold by a chainsaw type store ... Also if you are not planning on doing a hole shit load of heavy duty work with it maybee an electric one will work for you ...
Another plus for Stihl saws. We have two 290 farm boss saws and one of the Limb saws. Its a one handed saw for me and my wife starts it fine.
Another vote for Stihl, also Huskarvania is a good brand. Determine how large of trees you intend to cut down or up; width across, 14" or whatever and then size your bar to that and size the saw to the bar. You don't want a small saw with a 12' bar to cut up 30" trees; you also don't need a big saw with a 30" bar to cut up 8" trees.
Bigger saws are heavier, but a longer bar and chain allows the chain to cool a little, and wear the chain less. So an 18' bar saw will last longer between sharpenings than a 14' bar saw with the same motor. More teeth, more time, more cuts. Longer is much better than too short.
While not a pro grade saw, I've been very happy with my husqvarna rancher 455. 20" bar and so fat plenty of power. It doesn't rev as high as higher end pro saws, but it didn't cost as much either. Last fall we had a heck of a wind storm, had no problems cleaning up around our house or the neighbors and we worked that saw hard all weekend. As already suggested though, get plenty of spare chains and learn how to sharpen them yourself. I buy mine locally from a store that makes them on the spot from a big roll. Full chisel makes a big difference too if you are comfortable using it.