Note the points;
- Empirically and rationally possible
- Empirically and rationally impossible
If you note the question you raised in 1 above, all bolded items are related to empirically-related variables which has proven to exist as far as observed and verified.
Thus it is possible for such an empirically-possible world to exist say 100 light years away from Earth.
To confirm whether such a place exists, it is the question of bringing in the empirical evidence.
If you insist God is that bearded man in the sky, I can agree that is a possibility, but to confirm, bring the empirical evidence [bolded are empirical] for verification.
However the ultimate God that is claimed by the Abrahamic is non-empirical nor rational, thus impossible to be verified as real.
See my argument; viewtopic.php?f=5&t=193474
Are you an idealist?
Nah, not an absolute idealist.
If in this perspective, I am an Empirical Realist, i.e. there exists an external and independent reality [empirical rational] from my own self, but all these are subjected to the human conditions. In this case I am also a transcendental idealist.
You are more of an idealist if you think you are not one.
From what you have posted you are an empirical idealist and at the same time a transcendental realist.
From this perspective you THINK there is an external reality independent of your self [transcendental realist] but what is really real to you is only in your mind [i.e. empirical idealist].
Example you perceive and think [based on mind] there is a real table you can see but ultimately that is only in your mind via perception and as Russell stated, perhaps there is no real table at all.