1. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? (sample image)

2. Send them a magnet link of one of the files you wish to share, then see if they can download it; How to use Magnet Links & Direct Connect

3. Go to LW's menu bar, Tools > Options > Uploads > Slots & make sure both boxes have at least a number of 1 or higher. (Sample image, which is an image I posted for someone who wanted to limit uploads to one per person. You may wish to have these set higher.)

You didn't understand the instructions. What you needed to do was "create a magnet link", copy & paste the magnet link into an email or chat message to send to your friends. Then as soon as they click on the link, LW or their default magnet handler program will open & start or attempt to download the file. But you need to be online at the same time for them to upload the file from you & you need to have available upload slots & bandwidth for them.