I'm tired to study Japanese also with the on-reading?

I'm going to surrender studing kanji in the way I've done 'till now.
The other day I started from 0 to learning kanji again.
After reach 20 or 30 kanji, even using space-repetition's software in my iphone,
I keep to forget the (expecially) on -reading.
I remember the kun reading more easily, maybe because is more easy.
on reading have often the same sound or are brief words that sound all similar to me, jo, sho, etc… So I really forget it or they confuse me.
I never had a good memory, so, it's really really hard for me to study languages…
When I say I have a 'bad memory', I mean Really a BAD memory.
I can forget even one word that I learned 5 minutes ago, repeated for months, and YET to keep to forget that word/On reading.

After YEARS, I'm really giving up studing and forcing to remember what I'll forget after few times.

I could learn with much efforts to remember 100-200 kanji… But you can be sure, after I'll stop to do space-repetition's review, I'll forget again and again.

So. I decided to change the way I'm learning words.
We used to learn Japanese 's kanjis as if they are not 'words' but as many words to remember.
I'm tired of this.
I want to learn the effective word, without thinking the kun-on reading.

For example
if I learn the kanji 'oo(i)' Big, I learn just that this kanji is a word and mean 'big' and is it read 'oo(i).
I will not learn also 'DAI'.
Instead of learning that this word can be read also 'Dai ', I'll learn the other words when it's used and will be read as 'dai', for example to write the word 'daisuki'.In this way, I'll learn the words as they are, not the pronunciations.
But, since I don't have the necessity to become good to read Japanese books or newspapers, it's ok.
I'll learn word after word and I'll memorize that. Surely if I'll find a word that I don't know yet, I'll be not able to read it, (because I'll not study on reading anymore) but I'll took a dictionary and learn that new word and I'll learn that. I'm really tired to learn ON reading.

What do you think? Someone have experiment this?

Added (1). @I was talking about 'don't want to learn the on reading of kanji anymore. Not another space repetition game/software… But I'll take a look…

Maybe you need something like "Kanji Pict-O-Graphix: Over 1, 000 Japanese Kanji and Kana Mnemonics" by Michael Rowley: http://www.amazon.com/...mniglot-20

Well, your new plan for learning kanji (just learning words and gaining knowledge of different kanji readings that way) is exactly how I'm doing it, and I've had no real problems so far. Admittedly it's fairly early days, but I hate learning things by rote, so I just decided to learn it on a "cross that bridge when I come to it" basis.