Keep at it DaveSeaford - it's a great sport and lots of really nice people out there happy to help. Like you Dave I am also a learner - I did cheat a bit with a bigger board 220L, it was a bit more stable for my heavy weight - I am 105kgs.
I have been told that onshore is best (safest) for us learners - if we run into trouble as we can, it is just a matter of sitting on the board and the wind blows us to shore. I head to different spots in varying wind directions always where there is onshore breeze. One exception Lake Cootharaba, near Noosa, where you can stand up virtually all over the lake so if I get into trouble I can walk to shore
Time on the water they say and as you learn you will find it hard to spend as much time as you would like out there - stuff gets in the way - like work lol
I learned to beach start very early in my learning curve, to help with those situations.
Have fun and keep going
Cheers
Morgan