Long time reader, first post.
I have one of those B&D Alligator powered loppers. It is basically a small chainsaw in a set of jaws. To make it safer, you need to squeeze both of the black grips inside the handles at the same time to make it start.
I have quite a large garden (c. a third of an acre) with quite a lot of trees and when we first moved here I did think about getting a chainsaw but, like the OP, I was rather nervous about using one. A friend mentioned this to me and I bought it.
On the whole it has been very good. I was able to cut thinks quite a bit wider than it says by cutting with it angled up and then down to cut a notch. Doing that on two (or maybe three) sides left a relatively small part to cut by hand.
There are three issues with it:
- There is not a proper oil reservoir, just what I assume is a bit of pipe that leads down to the chain, from under a flap. So you need to stop and add oil quite often.
- The main weight, the motor, is quite near the front so it can pull down somewhat, the third photo here
https://www.amazon.co.uk/Decker-GK1000-Alligator-Powered-Lopper/dp/B000EOOJQI/
shows that somewhat.
- This is not relevant to the OP. I have the cordless version, which as far as I can tell they no longer sell. The batteries are NiCd (or maybe NiMH) not Li-ion and not that powerful. I have four batteries (from this, a long reach hedge trimmer and two from a cordless drill) and I made sure that all were charged before I started using this.
Having got comfortable with using this and because I was doing a lot more work on the garden I eventually bought a chainsaw.
Having said that, a friend & I have been cutting back / down a lot of self-planted trees (mostly laurels but some holly & yew) over the winter. Most of the time (probably more than 90%) we did it by hand. A bit of cutting back of thin stuff (with secateurs or loppers) to make room to work in and then cutting the branch or trunk with a bow saw or a pruning saw. All those branches / trunks were probably up to 5" in diameter. I used the chainsaw on the handful that were thicker (6-8"), a couple of times to tidy up closer to the trunk, and once on a laurel that had split into c. eight trunks each 4-6" thick.