Many clubs don't expect you to do much more than use your free daily pass to help the club accumulate additional XP. Some run lots of free internal club matches....some with credits as prizes.....and in a good club you can always ask for advice from people you get to know about club selection and other issues. The ones that require you to play lots of Clashes (buying club passes) can be avoided (or left if you don't find out too soon). Finding a good club adds a lot of value to your WGT experience....beyond the free shot and putter pals.
If you're looking to upgrade clubs and don't have a big budget then try the free credit routes (the daily videos etc) and see if they work for you. It can depend on the country you're in but seems to work well in the US and in European countries (I first played in India where there were no free credit options....apart from winning them which is tough when you're starting out!).
Irrespective of the free credits you clearly need to look out for the free rental weekends where you can, as it says, rent for free, but still get the 10% discount or for the occasional flash sale on clubs where you can sometime get a 20% discount.
It's also well worth looking at what other players have in their bag as that's a pretty good guide to what works. The top level players all have a very similar mix and it's usually the three wedges that have the most variation. If it's good enough for them you'll probably do ok with them too.....(my only personal piece of advice is don't have too much variation in your meter speeds.....you get used to a certain rhythm when they're all very similar).
If you want some instant improvement don't play the free rock ball. The 75 credit WGT Spin Slow meter will get you started and shouldn't break the bank. The Srixon Zstar (L11) at 180 should do even more for your game.