Hi and welcome to DV!

To improve your recall you need to start writing your dreams down, lie completely still when you wake up in the morning and try to relax. This will trick your body into thinking you're going back to sleep and your "dream memory" will be accessed. Once something pops up, try to "probe" that image or fragment. It'll end with you recalling an entire dream. Try to rewind those dreams in your head as far back as possible.

It doesn't take six years. Perhaps to master LD'ing, but it takes only a few days or weeks at most for most people to attain their first lucid dream. It's not that hard really. It can feel like real life yes. All senses can be felt and experienced in a dream. Some are even more enhanced if focused on, but it's not as "solid" in a dream as in real life. Lucid dreaming is never a substitute for real life. It's just like an awesome computer game. Remember that dreams are built upon waking experiences. If you just ignore your life and try to live it out in a dream, you'll end up with nightmares and depression and all sorts of nasty stuff.

OBE's are not scientifically proven to exist. There's theories that they are indeed real, but nothing has been proven. It's when your "spirit" leaves your body somehow and you can travel around in the real world, observing things happening nearby your house for example.

Ofcourse you can train yourself! It's all about awareness. When you're dreaming the logical centre of the brain is inactive. If you train yourself to activate that (meaning start thinking logically) you'll get lucid. Question your surroundings and real life in general. This will carry over into your dreams. Why people haven't heard of this is because sadly lucid dreaming is at the edge of the catogory of "crazy people's hobbies." Luckily Inception changed a bit of that. Another reason why people don't care is because it does take alot of effort to get good at, and since you only have a few tries at most per night, it's harder to stay dedicated than when practicing a sport for example.

If lucid dreaming became world known and accepted, the entertainment industry would have a hard time convincing people to play their games instead of going to sleep

Lucid dreaming is 100% real. An entire community with 50k+ members wouldn't exist if it wasn't. Remember that confidence hugely affects your chances of getting lucid. So believe in yourself and know you can get lucid tonight if you want to.

I hope that answered them all If you have any more questions, don't hesitate to ask.

Keep on dreaming!