I think that's a really good effort for your first build Louis! The mud effects are great & as Alan said, the missing bits give it a worn, battered look.
As far as gloss coats & washes go, the former is less important in 1/72 than it is in larger scales. I usually only gloss the areas where
decals will go to prevent silvering.
Many people get worried by washes when starting out as they seem difficult to control. For my King Tiger, all the weathering was done with coloured pencils - no paint washes were used
However, when you do come to attempt a wash, steer clear of acrylics as they often don't look natural. Oil-based paints work much better IMHO & are easier to work with.
Lastly, rubbing an HB pencil on exposed areas (hatches, turret edges etc) works really well to add a metallic sheen.
Cheers
Patrick