I found the bags invaluable as it meant I could keep fiddling with the design, adding and removing height etc. and if loose that would have been a bit of a ‘mare. The bags also contain and hold on to the lava rock so it doesn’t keep falling down your slopes as you play with things. I personally then found you still needed a bit of soil under your scaping rocks (on top of the lava rock) to allow you to tilt things around and get your rocks nice and stable, as the larger lava pieces don’t shift as freely as perhaps smaller pieces would.
Got my mesh bags from eBay or Amazon as I recall but can’t seem to find the details.
I might even have a few spares knocking around. I’ll take a look when I get back home. I’m away for a few days at the mo.
I’ve got hygrophila polysperma and difformis, amongst others but would suggest anything fast growing as sacrificial stems. You can remove them later if you don’t like them but they will help the tank to get going and stabilised. You may find some folks on the forum will be happy to send some out and I can also likely offer some cuttings to get you going, if you put out a shout when ur ready.
Floaters are a good idea too.
If your not a plantsperson (yet
) then maybe stick with easier to grow choices wherever possible. You can always swap some out later when you’ve found your feet. (I’m for sure, still finding mine)