Ok your placement should be good while it acclimates to your system.
Keep in mind if your trying to glue the shroom foot directly to a plug or rubble its not going to work. They excrete a slime and will just detach.
Here's a picture of one of my mushroom bowls I made. Nothing fancy and did the trick within a week later.
A pic of the shroom attached and in a mushroom condo maybe a cpl weeks later.
Put some rubble in and cover with net if you have snails or crabs that can get into bowl.
Let it acclimate and don't bother it.
Once you see it opening up you can put a little sand on the shroom in the bowl. Kinda like burying it but not fully burying it.
You should have no problem getting it to foot for you as long as its healthy.
Just give it time to attach and don't bother it for a cpl weeks.