Basically, your mri is saying "we see nothing on the right to cause your symptoms".

L4-5 left lateral recess disc bulge with mild left neural foraminal stenosis inferiorly, there is mild effacement of the ventral thecal sac.

You have a disc bulging on the left at this level, narrowing the space that the L4-5 nerve root exits through. Also, it presses slighting against one of the membranes which surrounds the spinal cord and it's tail, the cauda equina

L5-S1, broad disc bulge, eccentric to the left, with posterior element hypertrophic change, without appreciable mass effect. This disc is bulging a bit to the left, but they are not saying it compromises anything. The long ligament which goes down the back of spine, inside the spinal canal, is thicker than one would wish, but not narrowing the spinal canal, or they'd have said it. Worth watching, because this is one of the elements which can contribute to narrowing of the canal, along with posteriorly bulging disks.