Maths and science are really good subjects that are used to explain and understand a lot of the basic principles in engineering. Depending on the type of engineering you’re interested in, subject s like computer skills or coding that are becoming more available could also come in handy. Some of the more practical types of engineering could also use people with more experience in machining and manufacture. It sused to be called design & technology when I did my GCSEs, (a long ti me ago), I’m not sure what it is now but I bet you can still do something similar. Likewise at college for A-levels. If you choose to do a university and do an engineering degree a lot of them will ask for maths and a science subject as part of the entry requirements. It’s also important to also do subjects you enjoy and to mix it up a bit. I used to really love PE so I did that too and it added a bit of variety to the day and the chance to do something a bit different. I hope this helps, is there a specific types of engineering that interests you?