Hi,
Yes. In your "come and pickup yourself at infopoint" shipping method, that you configured using the "manual shipping plugin", you'll find a setting "override shipping address". You'll want to activate it so that it can display nothing, or some custom text instead of the shipping address area on the checkout, but also on the invoice, the email notifications etc. So usually you would want to enter your infopoint address and open hours there.
And if you want to block a shipping method for some products, you can activate the "shipping price per product" setting of the shipping method. Then, on each product edit form, you'll have an extra section "shipping prices" where you'll be able to block shipping methods with that setting activated so that the shipping method won't appear on the checkout when that product is in the cart.