I want to learn a lot because i want to reach at least st native experience of japanese, but is kinda hard to learn a kanji of 10 or more lines, can you give me some advice to memorize some kanjis and know how to remember them?
Don't try to overwhelm urself, try to learn at max 3-5 kanji per day; also try to see the mnemonics, there is a reason why they are there. Try to use resources that are around you, that itself is enough. Best of luck!
The best way to learn kanji is to learn the words they're used in. When Renshuu first presents a new kanji, hit Examples to see some common words. You might have trouble just remembering the kanji by itself at first, I usually do,, but when those words come up in your vocab reviews using the kanji instead of kana, then the connections should start forming in your brain.
Learning the meaning and what words they're used in I think it more important than even how to write them. There a lot of kanji I recognize and can read in context, but ask me to write it and, e..do...? Kore?
Breaking them down into familiar components also helps with writing. I haven't bothered learning radicals, but you start to recognise them after a while.
Honestly, 3-5 is a LOT of kanji each day - that is 50-70% of the jouyou kanji that adults know in Japan, in just a year (or a 40-55% if you don't do weekends). There's no rush here :)