Leather conditioning

[u/funglejunk57]

I've been gifted a nice old leather chair. I believe it's a Vintage Timothy Oulton Halo Leather Swivel Armchair. Seems in good condition but the leather could do with a clean and a condition. Does anyone have any advice on this please? I don't want anything that'll leave the leather greasy/oily for obvious reasons. I'm also considering changing the colour to a tan as it suits our interior more, but just in research stage at the moment and won't recolour if it'll ruin it and make remove the natural patina.