iGCSE's as an adult

Hi

I've recently started studying iGCSE's from home as an adult (26) with Cloud Learn with a view to doing an access course next year and going to university after that. I'm doing Science double, Maths, English and Travel and Tourism. I've been doing it for about a month now and it all seems to be going well so far. I'm working full time also so finding time to put the hours in is hard. I'm just wondering if anybody else is able to share and similar experiences. How long did you spend studying before taking exam? How tough did you find it?