I know of course practice is important, being discipline in learning new vocabs everyday if you can even, listening to tapes, etc. since I got to learn Japanese to be able to take university's course in a year by studying 6 hours/day every weekday!
But the thing is with Japanese, pronunciation is easier since it's like German almost, what is written is what you say, so once you tackle the pattern in pronunciation, you can say things correctly even though you don't know the meaning.
There are no masculin nor feminin nouns either in Japanese.
Indonesian is even easier! No past nor future tense, no plural form, no verb changes according to the subject, no masculin nor feminin nouns, and pronunciation is more straightforward than German even!
Any advice is indeed welcome!