All the things you are worried about are fairly common. Too common for your tastes? Maybe. They were for mine. I was in a very good position to get a tenure track position at a good university - I have a great publication record, very good references, good network, loads of collaboration, and so on. The politics was just too much, so I left. That, and I didn't want to live in the places there were jobs.
But in any event, you are going to find out if it is for you. And if it isn't, you'll still be in a great position to earn a living outside academia. So my advice is to work toward the academic position until you find it isn't for you. That being said, here is the single most important thing you can do for your would be career. It may seem trite, but try to get on with an advisor that has political clout. They will have reliable funding for interesting work. They will be able to afford to send you to meetings to present that work. They will have collaborators with clout (and promising post-docs) that you can add to your network. They will have contacts for good post-doctoral positions. They will have pull in getting you interviews for tenure track positions. And ultimately, they will sit or know people who sit on the grant committees where you go begging for your livelihood.