I'm starting weaning with my baby next week. Some guidance says start with two teaspoons worth, other info says two tablespoons...

I'm not sure what to go with?

I would start with a few teaspoons and if he wants more, give him some more. Let him lead you a little. If he doesn’t want it he will close his mouth or fuss.

Remember to start with it is mostly about trying new tastes and the experience.