french or spanish ab initioWatch
not amazing at languages I'm getting a 5 for Italian but I joined the course a year late and only started it in year 10.
which one is more manageable for me?
I'd suggest looking ahead at the syllabus and past papers to get an idea of the benchmark you need to reach for the final exams. It's a personal preference imo. I'm a Spanish tutor and some of my students are studying French as well and even though they get some words mixed up, example they might say a French word with a Spanish accent lol, they still find that it's a good combination/duo of languages to study as they compliment each other well.
Also, with both languages anyway, the root of the words are very similar so you will get words mixed up but use their similarities and the links to your advantage.
Not sure if that helps as it's a personal choice but look at the resources exam resources and materials and hopefully that will help!