Err... you might want to consider scientific magazines instead?
ISI-ranking journals (Nature and Science are the top two in terms of citations) are pretty specific in terms of research scope.. most people will not be able to understand what they are about unless if you are within the field itself

Anyway, I don't think Science and Nature covers alot on Physics, mathematics and chemistry

As for subscription, just wait until you enrol in Universities, most will have free library subscriptions