Studier the tripod the better of course. Wind is your enemy so weight it down if you can.
They would range from Artcise to RRS in pricing. Aluminium would be heavier than carbon fibre and better except for certain resonances. Lots of reviews out there. You can spend a lot on a dedicated EQ mount for deep sky (telescopes) shooting but that wouldn't be needed for wide angle astro landscapes.
Dan has a good review of trackers with pricing etc.
https://capturetheatlas.com/best-star-trackers/
Polaris is expensive but good. Hard to learn and there is a lot of people hoping that Benro can improve their software (which they haven't). I would recommend getting Dan's course on the Benro as he has worked out all the issues over years of running workshops with different people/cameras/setups.
I use a Star Watcher Star Adventurer Pro 2i. Not the lightest but good price and solid. The EQ base is great and I mount directly on the tracker ie not using the counterweight option.
I don't polar align using the built in scope. Southern hemisphere is harder than the northern hemisphere (no north star) and my eyesight isn't great focusing at that distance. I use the PS Align Pro app on my iPhone resting on the back of the tracker and it gives long exposure times without trailing.
The one "trick" I learnt is for the double bullhead setup. I use a 2 way tilt head at the base and is a lower profile than a ball head eg
https://www.amazon.com.au/dp/B0BFCX9MFX?ref=ppx_yo2ov_dt_b_fed_asin_title
It doesn't get caught by the notch like a normal ball head. I then add a standard heavy 55mm ballhead for the top one eg Artcise and a L bracket on the camera.