Hey,
Welcome to the forum.
I'm a lass, 5ft 4 and 54 kg
I got the m70's and that is what I would say is right for you. 60's would just be a bit on the soft side. 70's might be a bit on the stiff side to begin with but it's better to go over than under.
At the mo there is probably still a 6 week wait on getting the bocks in stock. If you don't mind waiting then you can just do that. If you do mind waiting you could look at getting another brand. But you won't be able to get them for the same price as projumps even if they are exactly the same.
Other option is to get some springs changed over. Costs an extra £15, takes an extra day to get them but then you get a set of m70s pretty fast, and still cheaper than getting any alternative brands I think. It's up to you really.
Where abouts are you? Might be near a group