Geeetech

Today I print nicely, I just push a little the wire during the first layer and watch for buildup of drops on the bottom.
Otherwise it all works for me.

You can cut a small piece of tube and stick it inside, as I did.
So you don't have to worry about insertion length.

Check on the cooling and on the full insertion of the tube.
Usually in my case it used to melt and become big, then it doesn't melt anymore.
You can also pull out the heating part a little to make sure it melts at the bottom of the tube.

Well guys,
after having solved my issues and started printing, looking at it backwards, here is my main suggestion:
Why don't you buy some quality PLA to start with?
Something that is easy to print, so you reduce issues to the bare minimum?

I now found out that some of the cheap PLA I bought won't ...

Hello all, I totally solved this issue, going from a total mess of no-print to perfect printing.
The reason is very simple detail in mounting, something that some do and other don't, which is not explained in tutorial.
I guess if somebody is not a first-time printer can figure that out after a while ...