I can do most anything on a bike, this bike was dismantled for the winter months and I finally got around to rebuilding it just lately , in my opinion as said I am wary of over tightening so as not to cause damage to the frame , ie, if you was to tighten the back brake hamfistedly and cracked the bridge , that’s it ,
for up to £50 a torque wrench with sockets would be a good addition to my tool kit ,
Torque wrench is next on my tool shopping list - not because I need one, but because I'd be more comfortable with more expensive components. If you don't have one yet, I don't see anything wrong with taking your bike to the LBS and asking them to appropriately torque up the bolts.