What a great forum and community! I already learned heaps just from reading here. I am only very new to windsurfing (few months). I took one beginners lesson and at the end I could sort of sail back and forth on the learning gear and board they had. I ended up buying two separate used gear and boards (one purchase was sort of an impulse and rushed buy! Which I sort of regret). Here is a list of my gear:
Starboard go 139l board (using this board for the time being)
Bic Techno 143l board (haven’t tried it yet in water)
4.7, 5, 5.8, 6, 6.2 and 7m sails from different brands
2 Booms and 3 masts of different sizes. Also have a harness and harness lines
I am 172cm tall and weigh around 75kg and 40 years old
My first few attempts with my own gear were quite frustrating and disheartening where I couldn’t even get going. I think my initial leaning phase could have been a little bit easier with a slightly bigger board but now I can at least sail with my own gear and I am not thinking about giving up the sport

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I understand that practice, water time and determination are the key to improvement. I just wanted to know or ask you guys when should I start trying to use the harness? Should I be planing and using the foot straps before trying the harness? I think I am close to planing in the right conditions but not quite right there.
Also I find it a lot easier to sail in one direction then the other, is this common for beginners?
I have been practicing beach starts in my last 2 sessions and managed to do about 5 (out of maybe 100) and got going which felt great. Another question I have is should I just concentrate on sailing and planing more consistently before worrying about beach starts, water starts and jibes?
I already had some great advice and tips from experienced windsurfers when out in the water which helped me heaps. Any advice and tips will be greatly appreciated.
Thank you in advance
P.S. I think one of my biggest mistakes is bending my arms which I am trying to correct.