Africanlion,
I am glad to hear you really enjoyed the trial flight. Also glad to hear that you are seriously considering becoming a pilot.
Unfortunately, there is a lot to consider between doing your PPL and getting your full instrument rating. To note, you need both the plane, and pilot to be suitable and legal for IFR flights. This entails getting your IR (instrument rating - on top of your PPL, this takes a lot of hours, both in the air and on the ground) and flying a plane which is allowed to fly in IMC (your Zenith idea would be illegal to take into IMC in many countries, so you'll have to look into that).
With regards to your Garmin GPS (and stuff), yes, there are some such as the G1000, G500, G600 (or G900X for homebuilt) for instance, which would have (sometimes optionally) SVT (Synthetic Vision Technology) which *may* or may not display all mountains and obstacles. This isn't something that we rely on, and in some countries, you are not allowed below something called MSA (minimum safety altitude - MVA [minimum vectoring altitude]) without being on an instrument approach (UK excluded of course!). These are generally not available outside of large airports, but in some countries (USA) are becoming much more frequent (UK get with it please....) - if you are planning on flying IFR in the African bush, with your little Zenith (providing you have the rating, and the plane has been cleared for IMC / IFR flights, and of course you are current in IFR flying etc...) you would still need to be sure that you either have an airport with an instrument approach, or be sure that your destination's weather is flyable under VFR (visual flight rule) [and maybe have a change of underwear after going through the usual convective weather.]
re: your left turn, people are often more scared whilst sitting on the left, to turn left, as you feel closer to the ground and have a better view straight down! ;-)
I hope this helps & good luck learning!