Let's look at what a linden tree consists of.
If you examine the picture, you can see the trunk. Branches extend from it, and around each branch there's a fluffy cloud of leaves. To draw a tree, you need to replicate this structure.
You can practice by drawing a trunk with branches, outlining the branches with leaves, and doing this several times. Later, if you don't have time to draw and erase the trunk, you can try the following trick: start with a small stump protruding at the bottom. Then draw clusters of leaves on top as if they're surrounding branches. You don't need to draw the actual branches anymore.
For aesthetic appeal, you can leave a few gaps between the clusters to make the trunk visible.