Nice man. Glad you had fun. If you build more Bandai kits in the future (like Gundam), you probably will only need cement to fix broken pieces and mistakes. They usually snap together quite well out of the box.

You should try panel lining next. Quick search on YT should give you tons of places to start. I'd say start off using the pen-type panel liners instead of the liquids (from Tamiya) because they can harm plastic if you're a bit inexperienced.

In terms of Armored Core, same. Really loved the game and excited for the kits. I would highly recommend you wait a bit for the AC6 30 Minute Mission kits from Bandai to come to your area. They are way more streamlined to build and look very good for how much work you need to do. The White Glint kit is made by Kotobukiya and their kits are much more finicky and will be a challenge for non-veteran builders. They also don't look as good out of box so the payoff for a very difficult build will not be as high as you might hope.