Also helpful would be a little more explanation of "experiments..."
The tripod and the "head" are usually separate parts, but many tripods come "bundled" with a tripod head.
Don't forget the screw post size though most all cameras use 1/4 and most tripods have mounting plates for that as well.
Personally, i do like having a level built into the tripod head in the two x-y directions when using a 35mm or 120 format camera. The level is easy to see, and there are no other leveling adjustments that can be made to these cameras, so it helps immensely. In my vernacular, the y is toward the scene. the x is the most important for me - but you need to make sure that there are no visual lines or cues in the scene that clash with that leveling. Just keep an eye on the image in the viewfinder to make it to your liking, and check the x for fine tuning if appropriate.
An alternative for 35mm especially is to get a hot shoe level if the head does not have spirit levels built in.