Would love to try anal sex, any suggestions on what is the best position to adopt, to make it easier, and any other tips would be good.
No one seems to agree on what the best position is , which I take to mean that it's different for all of us. So try a few.
As for other suggestions (apart from using a lot of lube and reapplying repeatedly), I'd say go a lot slower than you think you need to go, take lots of time to breathe, and above all, be sure you trust the person you're with. The onus is on him to be careful and follow your lead. If he starts barging in and making you feel uncomfortable, find someone else.
Also, there are lots of threads on this site with lots of advice, so you might give them a search (if you haven't already).
Good luck!