Need some tips.

It's been 4-5 days now and no lucid dream. However, I have not been a good boy and have not followed the examples pointed on here. Such as spontaneously asking myself "am I dreaming" and doing reality checks such as counting 10 fingers, looking around my room and sticking my thumb into my palm.

I have however, been writing in m dream journal which are all quite absurd after reading through them.

It's 10:50 close enough, shall I start asking myself if I am dreaming and doing reality checks from now on until I go to bed to increase my chances? I'll go to bed around 1am.

Sure. Whenever you want to start is a good time to start; however, for best chances of success I suggest continuing this reactive from now on until it becomes a habit. Most people take more than a few days to learn how to lucid dream.

Am I supposed to do this throughout the whole day? I would look like a nutter in my lectures.

You do not have to do it in a way that is conspicuous. The most inconspicuous reality check is to just in you mind (not out loud) ask yourself seriously "Could this be a dream?" Look around for anything weird. Try to recall how you got where you are. Try to recall what you did in the last five minutes. Oh and maybe if you have a backpack seriously expect to find some gold in it, and then look inside your backpack to see if your expectation caused it to be filled with gold. If you are in a lecture, there are likely written things around you, so read one of them, then inconspicuously look away, and look back, and reread it, and see whether it changed - I bet this can be done fairly inconspicuously if you care (I don't care if others think me nuts, so I do not try to do it inconspicuously, but you can). Also if you do not mind others thinking you are in a hurry to get out of the lecture, you can check the time twice in a row and see if it changed - most people will just assume you wish time were moving faster and you could get out of there. So doesn't that sound like stuff you could do without looking like a nutter?

I agree with Joanna. And also, unless someone is SERIOUSLY watching you, then they won't see you looking at your hand to count your fingers.