Parallel is not for beginners. The strings require balancing and the use of fuses. Balancing is checking the actual Vf of each led and making sure the strings balance out to take the power equally. Let's say you got 1 string that pulls 44V and another that pulls 35. This happens a lot. The LEDs don't all pull the same voltage. So you'd need to measure each string and pull out certain LEDs and add them to other things and vice versa to get the strings to equal out.
You also need to use fuses and resisters to make sure the power doesn't got above a certain range. If you have 3 strings each pulling 700ma, and one blows, the rest of the strings will get the other strings 700ma and split it making 2 strings get 1050ma. Putting a resistor will protect the strings from over current and fuses will, when blown will protect the entire string from blowing.
I'm pretty experienced with diy LEDs and still don't like parallel strings. Check out buying a dedicated power supply and look into LDD drivers from meanwell. The can be had for pretty cheap and by buying a nice sized power supply that leaves room for growth.
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