Yep, starting to make cider is the start of a never ending adventure.
My first batch was via SWMBO's food processor... it took a long time, made a mess and I was banned from the kitchen soon after that and had to get my own rig.
Apart from the press you will also need something to grind the apples fine enough to press. I have a second hand metal press and home made scratter (along the lines of Claude Jolicoeur's design plus a few hints from other designs from YouTube). I just set it up outside on a nice day, drink last year's cider and grind away.
I responded to a post by Patricksull on 22 June 2020 on a similar topic which has the details or you can do a search of my posts for the same date. It has pics etc. Let me know if you can't find it and I can send the attachment document.
As far as the press is concerned, mine is similar to the one pictured above. I found a few issues that needed some attention. The screw pushed down on a metal fitting attached to the pressing plate but it had had a slight tendency to wear away under pressure. I have replaced it with a thrust bearing from eBay which works quite well and also makes the screwing process smoother. I put the pulp into a fine mesh bag (again quite cheap on eBay) as the mesh on the press basket is too coarse and in any case putting the pulp into the bag then putting that into the press makes the whole process easier and less messy. I had tried making some "racks" from a PTFE cutting board in order to have a few layers or cheeses of pulp in the press at any one time but it didn't seem to make a lot of difference to the yield for the effort involved.
It is interesting to note that Andrew Lea believes that juice yield is not a linear function with pressure. He says yield only increases by about 5% with each doubling of pressure. So, I now find it easier to grind a few more apples rather than bust my boiler trying to screw another cup of juice out of the press.
I get a juice yield of around 50%-60% (litres/kg of apples) which isn't the world's best but works O.K. for me as I tend to do gallon (5 litre) batches of different apple blends from my small orchard. About four loads in the basket results in a gallon of juice from 10kg of pulp or 100-120 apples..
Have fun!