In the wake of the North Korea firing of a potential thermonuclear bomb, the CBRNePortal has a piece differentiating Fission, Boosted Fission, and Fusion (Thermonuclear or H-bomb) at a fairly non-scientific level. Good read to gain a basic understanding of the differences for something which is driving global policy right now. Also, an older video from 2016 by Discovery News differentiating the two can be found here.