Question about Humble Bundle Subscription and Humble Collection

is before the first Tuesday of each new month. (and before the schedule depends on each country which upload the new games)
From what I read, 2 games were revealed: Temtem and The Outer Worlds: Spacer's Choice Edition for the month of July. If in the end it's those 2, for me it's a good month, but just in case, I already canceled mine and I'll wait, I always cancel because I don't care about the discounts they offer me for keeping humble choice active

Never played but it says it's available to play through the Humble app if you're a Humble Choice member. If you cancel it I assume that you are no longer a member and can not play

Humble Collection is an exclusive Humble Choice member benefit. I've never used it, but if the terms apply, once you cancel your membership plan, you would lose access to this functionality.

https://support.humblebundle.com/hc/en-us/articles/115008249667-Humble-Choice-Perk-Humble-app-and-Humble-Games-Collection#access

Cancel before the next automatic billing date.

The auto-billing date is the last Tuesday of every month if you have a non-gift plan activated.

Gift plans don't automatically renew.

As said before me: autocharge happens at last Tuesday of a month, until then you can stay subscribed without actually paying for the next month.