I am the same, never modded before accept 57i on my old mk3 8v.
Now in few months have done -
Revo Stg 1, WALK, THS engine mounts, DaveB NQSBBK with DS2500
edition 30 badge front grille, open fog grille, in pro aluminium wing mirrors and smoked indicator lenses, reat abt tuning number plate surround, ecs climatronic rings, aluminium steering wheel inserts, audi r8 oil and coolant caps.
Am now considering not taking it to stg 2 as not convinced you get good value for money but will be going up to see Dave @ PDT at some stage for Bilstein B12 and Autotech internals as even if leave on stg 1 think will benefit from these mods