In 25 years of being a post-doc' I can assure you that there is no 'normal'. The university, the department and the supervisors are all different and with them the level of useful support you will receive. It's not uncommon to find the supervisor has no hands-on experience with the techniques you need to learn, so your best resource is often technicians or fellow students. Sadly, you seem alone, and in this instance, as with the rest of your PhD, you need to dig deep and read the literature, search online, and even ask in other departments if they may have the expertise you need. It's normal to have 2 supervisors. what does the other have to say? Don't withdraw from the problem, as it will eat you up, instead, be vocal and plan a meeting with your supervisor. Send a list of issues you want to resolve at the meeting, but don't go expecting to be given the solutions on a plate. Do explain what you've done to try an progress and what is your current level of understanding so you can discuss the best way forward. Try this approach for a couple of months and see if you start to feel better.
Don't worry. A Phd will be the hardest thing you have ever done so far. No student knows what the heck is going on for the first year, but by the second year you will be bringing in useful data, and by the third you will know more about your subject than your supervisor, which in your case sounds like it won't be hard!
A Phd is meant to be extremely taxing otherwise everyone would have one. You will become exceptionally resourceful and self-teaching, two assets far more useful than the PhD itself in your later career, and indeed life in general.
It will get better, I promise, but it's up to you to make it happen, and to organise your supervisor so in the end you are controlling them.
I've known around 150 PhD students during my career, most get through, a few drop out, and a tiny minority fail. It's always the most independently minded that have the easier time as they make it work in spite of the supervisors.
Above all do not expect them to show you much, or help you directly; but they should point you in the right direction, and respond to requests for meetings.
It's a crazy time and a quantum leap up from your graduate level experience so to ease the stress make friends with other PhD's wherever they hang out and support each other as It'll make you feel less isolated. Dissing supervisors is very therapeutic!
Don't give up, it'll be OK, we all had a really hard time for the first 6 months or so.
My only caveat is if after 9 -12 months you are still lost, figure out of it's you, your supervisor, or both and look long and hard about if you can still make it work. Also, you must be interested in what you are studying to be happy. If it's a total chore, then you need to ask yourself a whole bunch of difficult questions. If you are absolutely convinced its not for you, then bail out rather than leaving it for another year, as by then you may be as much as 50% of the way to a PhD and jacking it in at that stage will be something you may regret many, many years later when you as old as me.
Finally, enjoy the environment, people and opportunities. Don't just treat it as a means to a few letters, but as a period in life that very, very few people are lucky enough to experience.
Good luck to you, dig deep and be magnificent. :-)