I'll reiterate what Vlad said: Make videos for your own enjoyment and truly love your work. Regardless of the opinions of others, if you can accomplish this one goal, you will be greatly rewarded.
Quality doesn't always matter... when I made my first real AMV, I used the MS Video1 codec... but it didn't matter... that was the only option I knew at the time (pre amv obsession haha). I loved the video I made with it and still do to this day. Though I did update the quality because I knew the video deserved it.
Audio video sync is simply something you customize to your own liking. Find a method that works for you and practice practice practice. Take in the videos you enjoy and note what you like the most in syncing and assimilate it into your own style... and also always stretch your imagination. Creativity in general is always something a video benefits from.
Practice and experimentation help alot. I make videos because I enjoy the process and I like to share my thoughts or viewpoints of a given anime/song. Don't worry about effects unless your personal vision includes them. Also never let anyone discourage you. If you've gotta make dbz + linkin park because you love it so, then go for it.
As for .org:
Never expect anyone to watch your videos or write reviews for them. Share comments in the reviews of videos you enjoy. Take advantage of the review exchange forum. Interaction is the key to personal networking... of course positive or friendly is better than 'u suck!'
The key: Make what you want to see.
I am an aspiring video editor also.
