Plants cannot live without a source of light. Herbs need to be in a south facing, sunny window or have full spectrum lights close above them.

You must water them only when the soil gets fairly dry, not on a schedule.

The only herbs I am able to grow fairly well inside are basil & parsley. Both are on a southwest facing window sill and I only water about once a week, maybe a little laonger, depends on if it needs it.

No, a wall isn't sunny enough. They have to be on the windowsill. The windowsill needs to be in the sun for at least a few hours.

Despite what you see on TV, herbs are NOT houseplants and will not survive long term indoors. Cool temperatures and lots of very bright but indirect light are required but even then, they will be temporary visitors :-))