Stjuk
I would second fox's advice. Whilst there are some on here with the time, interest and financial acumen to use other investment vehicles, the C fund is a useful way to invest in equities and to build up steady growth over time. It's not a get rich quick scheme and shouldn't be seen as such. It's ideal for the majority of pilots, most of whom are pretty crap at investing generally. Especially the lazy ones!
First step is arrange a free meeting with Mondial. You get 2 per year so take advantage of it. There's no hard sell, just good advice based on what you want the fund to achieve when you retire and how much risk you're prepared to take. They'll also look at your other investments and assets to make recommendations.
One thing I will strongly advise against though is using ETF's if you're not au fait with the basics first.
Harry