Hi there! Please help - I've been putting so much effort into this tree, I don't want to see it die :(

I'm growing a mulberry tree at home and it finally got a new branch growing. However I noticed that two of the new leaves are drying from the tips and one got darker veins; there's also an old leave that got a lot of brown/dry patches; these seem to be different issues. What can these be?
I water regularly; soil is regularly moist (the very bottom reads wet, it's probably not draining the best)

Thanks a lot in forward!