I think I would base myself at an airport. Should be a good amount of emergency generator power already wired in and set up.
Loads of weather proof large warehouse for vehicle (all sorts), component storage, books/knowledge, weapons, food, water.
I would gather jcbs, cranes and the like. And set up big arrays of wind turbines and solar power (electric and water)
I would get absolutely huge water butts for run of water from the buildings. Although chances are bottle water would be plentiful.
I would go to librarys/shops and find survival, hunting, farming books.
I would set up computers and/or find books for flight simulation and learning things like navigation. Learn to fly, first in light aircraft then moving upwards.
Raid a military base for weapons, ammo and body armour.
Raid hospitals for drugs and equipments. Especially antibiotics.
Set up old fashioned wooden water turbines for pumping water for farming and for things like grinding flour.
You wouldnt actually need to do much of that. If you were the only human in existence then a Generator would be fine, Fuel isn't a problem, what is held in a single supermarket would last you for years and a fuel hand-pump would bypass the mechanical feed.
Learning to fly would just be dangerous in the extreme, so why bother, remember a broken limb and youre dead. Stock up on broad spectrum antibiotics and a good medical diagnosis tool is a good idea. Tinned food would last for decades, as would bottled water. A rifle and handgun would be sufficient as there are no Humans to worry about and most dangerous animals would stay far from you, not that there are that many. Domesticated animals turning feral would be the biggest threat, again an innocuous dogbite could kill.
You would be better off, in a small holding somewhere, away from cities and towns (feral dogs etc, rotting food, crumbling infrastructure are all hazards you could do without). Grow what fresh food you can, tinned and frozen food would take up the slack. A couple of good generators and a large strong electrical fence would deter most animal threats and supply the electrical power. A couple of dirtbikes and a landrover or two for transport. The roads would be pretty impassable due to abandoned vehicles and degredation.
Teach yourself mechanics, gardening, husbandry and wood and metal work. useful stuff. You dont need extreme survival techniques or SAS training. Growing enough wheat to bring in a viable crop for flour production however small would be a full time job so wouldnt be practical, get used to a vegetable and meat diet with tinned food for variety.
Your biggest problem is being alone, too many tasks require two or more people, most people would be sinking into madness within a few years.