There are a ton of mods available on XB1 (using them turns off achievements if you're hunting those, fyi), but given that the console is about as powerful as a low end pc you're not going to get a whole lot of big texture mods or huge visual fidelity improvements because the console just can't handle them. That having been said, there are an awful lot of character mods and gameplay tweaks to find and play with. FWIW I found it much easier to go through bethesda's website and favorite mods that way rather than try to search through the list in game on my xbox.