time pedals don't have adjustable tension, but they have variable release angles.
i've got early time atac pedals on my bike and have been thinking about switching. i like the pedals but even on the narrower release angle, i sometimes have trouble getting out. the owner of the LBS said that time pedals are among the harder pedals to get out of. if i had had to pay for these pedals i wouldn't have bought them, but since a friend gave them to me new for free, i'll use them until i decide to spend money on a new pair.
on some falls when i think the pedals should release, they don't and it creates a slightly more difficult situation.
i don't think i would recommend time pedals for your first clipless.