Hi Katie,
Welcome to the club. A mk2 1.3 was my second golf, I upgraded from a mk1 1.0! They are great little runabouts, handle nicely and if it's your first car it's remarkably practical.
With regards to making it an easier car to drive - depending on where you live, I would advise against coilovers. I bought my GTi with coilovers from someone who lives in the country outside Bath. However in London it's horrid. So think about how many speed bumps are near you. With mine lowered 48m it can scrap the front (big) spoiler as you come off.
You might want to look at fitting a weighted mk3 shift rod. - I know that helped the gear feel on my GTi other people will let me know if this is a good idea on a 1.3.
Mk3 wiper relay is a nice mod so you can change the intermittent timings on your wipers. - quick easy and cheap too.
X4MGS - a regular on here, has a good ebay shop for genuine VW bits. I try to avoid GSF and eurocarparts as they kit is quite ropey a lot of the time. VWheritage are worth a go for a fair few things.
The last tip I can think of is, if you ever get really stuck and need advice, ask; if Rubjonny helps you - listen to him - he is always on the money!