It looks fine mate but imo render should be more central or on left side of the signature. Render work is ok but I'm not sure about texture work, you need to improve that mate BG is ok but little more work would be nice. Text is ok, simple but ok, try to add textures and effects on text also, anyway, nice work mate, KIU

Fine signature mate, but its a bit to simple.

Render work is allright, but add some more textures. The effects looks nice but kind of oversharpend.
Background is ok, but to simple. Add some more textures, and a second render. The second render you have added is okay, but the placement is not that good, should be more visible in my opinion.
Font is okay, but could be improved. The yellow color dosen't fit.
Colors are ok, but to plain. Add some more contrast and some lightning work.

Keep practising mate.