Hi,

From experience i can tell you that my WILDs are way more unstable than my DILDs
In my DILDs at times i don't even need to stabilize a lucid dream to get some fun
But with WILDs it becomes kinda mandatory

After successfully transitioning into dream world i'd suggest you doing stabilization technique
And same for any moment whenever dream starts to feel as if it was ending/fading
Here's my favorite Dream Stabilization Tutorial Dream Stabilization and Clarity Tutorial - Lucid Dreaming - Dream Views

You shouldn't put too much focus on vibrations n' dreamlets imo
It might be just that your paying too much attention to them and it causes wild process to disrupt?
We are everynight put mechanically by our body's mechanisms into a dream world
1. Fall Asleep
2. Unconscious
2. NREM Goes on
3. We reach transition
4. wild a-like stuff is going on
5. after wild-alike stuff or during it we are put into dream world
6. Some time after being taken in by dream world we become conscious again yet with low conscious which regular dreams have?
So maybe letting the flow go could help you with WILD Attempts

For exiting your house in a dream you maybe might try to do some 'Dream Control Stuff' like having confidence that behind doors there is beautiful hawaii beach or that behind you there is a street since your standing on it or maybe you've got portalgun in your pocket, take it out and create portal that will lead you to the choosen place etc.
Also don't think or fear of waking up whenever you try to leave house it might result in real wake up or false awakening or at best in nothing.

- Goodluck