Good reading! I would add some ideas as I see them:

Perhaps it is too much to say that "time is invented" by us as time is necessary to perceive the change. We can say that time separates experiences from each other as does the room. Each room point gives you different perception experience.

If you look quantum level then you see there is existing shortest time interval. It is shown that there can't exist shorter time break between different perceptions as it can't exist smaller room than measure of quanta.

There are two ways to perceive time:

Dualistic way - time is separating us from past or from future and our attention is wandering constantly between what happened or what might happen.

Non-dualistic way - by being in now our attention does not wander but is focused on present moment. However - we are free to direct our attention into experiences in past and re-evaluate them or plan the future (what kind of house and in what way I will build it.

This means that now might be sometimes even few years long when you plan your education or build an house.

We can say that there is psychological time which is kind of construct of the mind of particular subject and sequence of experiences which is not construct of the mind of the subject. In a way we can say that everything is mind, but this would then be called THE MIND.