“Any hints or advice” for engine assembly, is a bit like asking “any thoughts on religion or politics“ !
Honestly, I’m not being a curmudgeon, but you’re unlikely to receive useful input.
Gorts advice on the videos is your best bet, Mick Hemmings videos for engine and gearbox build are absolutely first class.
Norman Whites book on Commando restoration is also a valuable addition to the bookshelf.
Other than that, asking specific questions, ideally with accompanying photos, will usually elicit extremely helpful answers on here.