There are three adjuster knobs on the back of the headlight for beam alignment, or you can go to a friendly garage that does MOTs and get them to sort the alignment.
Don't go HIDs, as they are illegal, and will make you look like a c0ck, and everyone will get pi$$ed off at you blinding them all the time.
My car had HIDs when I bought it, swapped them out for some phillips 100% brighter bulbs. I don't miss the HID brightness at all, and like you I drive mainly on unlit country lanes.
The relay set up guide is in the mk2 section, but its basically a relay for each headlight that uses the original power supply for the bulb as the switch, a new earth and a power supply taken straight from the battery.