It can be easy to overcomplicate DIY mixing. Seems to me like you could mix something ok for starters and don't aim too high. All you need is some nic, some PG and some VG and one or two flavours. Nobody creates a great mix at first try.
Or you could order some zero nic juice from the UK and add your own nic?
It won't take much effort and will be worthwhile - plus you'll save a lot of money. There's plenty of help to be had here.
@FranC has a great thread with really helpful members :
Random DIY mixing and More