Cool. Yeah, I can understand the 'different enough from English to be somewhat difficult'. To me it's the same with Japanese. It's tough at first to get used to it, especially if, like me, you had never seriously studied a language before. But I think it gets better. It has for me with Japanese, anyway.
I know somewhere around 1500 kanji so far. I could have learnt all the general use kanji by now, if I were more efficient, but unlike some fortunate people
I just can't seem to make use of mnemonics to cram them in methodically. I've been mostly learning by a mixture of rote, using them myself, and just reading. I tend to memorise the character and its meanings in English much easier than remembering the readings. I can't write anywhere as many characters on paper as I can read, obviously. Writing on paper isn't my priority. I'd like to learn proper writing eventually, but right now I'm more concerned with achieving fluency.
I don't know why, but I seem to be unable to utilise the learning methods I've seen others suggest. I wish I could make use of them, but I feel stunted somehow when it comes to forcibly studying, and more like a child just learning by reading and doing. I suppose for a little over a year, I've not done too poorly, but I often obsess over whether I'm learning fast enough.
What are your main reasons for learning Mandarin? If you don't mind me asking, of course. 