but this is clearly not the strong point of the environment sadly !
Ardour is my favorite. It took some time to adapt but as a non professional, I don't miss any feature from Ableton anymore. I use Ardour every time I play guitar with some marshall amp sim (https://www.kuassa.com/products/amplifikation-caliburn/) and a few plugins to pock around riffs and experiment by creating drum and bass lines using a midi piano
If you're looking for cheap (but not open source), Reaper is really fantastic and at an incredible price point.
To add to this: Reaper may not be open source, but it feels like it is. There is no other DAW that is more extendable and configurable. If you can imagine it, and can script it, you can do it. There is a huge community of free add-ons for it. But in full disclosure, while I own it, I do most of my production work in Bitwig.
Just tried LMMS briefly. Sorely needs a tiling window manager - or at least window snapping.