In reply to Robert777:
Morning Robert.
As to being unsure as to how much to pack, that's a feeling you share with most people, regardless of experience.
There's a lot of good advice upthread. Something that often goes unnoticed though, in the choice of what to take, is how that choice is actually arrived at. If you had the money, you could read all the reviews, and acquire all the latest expensive 'lightest in test' gear. But this doesn't necessarily result in an easier expedition - As an example, top spec lightweight 'waterproofs' sometimes don't work well with a heavy rucksack, and it's not easy to cook sausages in a Jetboil tower stove. Lightweight gear can give the opportunity to have a more enjoyable expedition, but the drive to go light can also mean you end up underequipped.
If you don't know what you need to take, then take time to think about it over the next few weeks. Think about it a lot. Watch out though for the tendency to think you need an upgrade on x,y, and z. Advertising and reviews seem all the more convincing if you haven't thought about it. Think about what you don't need- what will be the consequence if you don't take it (e.g. towel, toothpaste, shampoo, solar charger, massive swiss army knife etc), how could you use another bit of kit, e.g. a cheap 'Buff' copy instead of a towel. Is a squash bottle a lighter and more useable choice than a hydration bladder?
Do that, and it'll give you plenty of ideas how to make the next exped even more adventurous. Take advice, but weigh it against your own thoughts. After all, it's your expedition.