The first mod you should do is install a boost gauge.
This way you understand more how a Turbo works and when to expect boost. Not only that, but you will also see what your stock turbo makes. It will differ depending on your elevation. At home I see 9psi at max boost, when im in the mountains i see 11psi.
A bone stock EA82T should boost at 7 to 8psi stock with no intercooler. You add an intercooler and that will drop to probably 5psi. Your ECU will cut fuel at 11psi if I remember correctly. Maybe its 14psi, again it can depend on elevation. Regardless, anything below 10 is safe but only with a propperly installed intercooler and bypass valve. Notice how I said bypass valve and not a blow off valve.
The EA82 Turbo will not make huge power, but its a decent engine. its a very good learners engine. If you have any questions about anything I just discussed (bypass valves, intercoolers, PSI in relation to atmospheric pressure) then you are not yet ready to do a TD04 and top mount swap.
I also suggest you put the stock air filter box in place. Unless you already have done exhaust mods, your intake mod is near useless and will cause more harm than good in the long run.
-Brian
p.s.
Welcome to the board.