Hi & welcome to the hobby and BM.
I keep a lump of BluTac on the top of a old coffee jar (which is filled with lead shot for ballast!) & when painting things like wheels ect,I cut the spru off & stick the sprue end in the BluTac.That was it keeps it steady while painting.You can get a low stick tape to edge the canopy when painting,dont use masking tape as it leaves a sticky residue on the plastic which is a bugger to remove! I'm not a fan of this Maskol stuff for masking canopys.
I also have a old metal pencil case as you will always get bits break off the sprue & lie in the kit box.Put them in the pencil box & you wont lose them.
Good brush to use for dusting off models is a girls blusher make up brush!I kid you not!!The long fat bristle head means you wont break off bits when dusting.
Instead of pliers for cutting the sprues,invest in a pair of fine electrical snips,like for fibre optic working.Nail files & those nail file pads (cheap as chips from Superdrug) are better than sheets of sandpaper.(the file sticks last for ages)
Anway,
Welcome to Mad Mikes Play Away site for the over forties!
Merv