I just moved to Portland from the Bay Area
Your T4 looks good and like it's ready for some trails.
I moved from SoCal last year, still trying to find easy to moderate off road trails. There are a lot of forest roads, but most appear to be easy gravel covered 2WD, even though they are very scenic.
There is Brown's camp out on Hwy 6. Went into it last month but could not figure out the trail maps. There are YouTube videos of Powerline and University trails at Brown's but they look too narrow with sharp turns where sliders may be needed.
If you like sand dunes, there is Sandlake on the coast south of Tillamook. It's a bit small but a fun ride by the surf and the dunes. An ATV permit is needed a dune flags are required. I enjoyed a recent trip there, you do need to air down.
A nice scenic drive with waterfalls everywhere is North Fork Road southeast of Salem off of Hwy 22 (mile marker 23). Simple gravel, 2WD. It becomes forest road NF-2207 past Elkhorn. You can take it to Shady Cove camp and back or go over the pass and come out at Detroit lake. The pass and down is a little rocky and an ugly ride after the forest part.
Check the post - "Central Oregon Day" from members near Bend. They have recent trip info and may be doing another group ride.
Check this site -
Portland & Vancouver Area 4X4 Meetup (Portland, OR) | Meetup
They have made a few trips to Brown's Camp.
When we get some snow, Government Camp area can be a fun drive on packed powder and on up to Timberline Lodge. I enjoyed that last January, my wife not so much.