Definitely do Time Machine first, then his other "classics for a reason" the War of the Worlds, the Invisible Man, the Island of Dr Moreau, and IMO the Food of the Gods. His work tends to have a sort of bipartite structure where the second half diverges quite a bit from the first or there is a major thematic shift partway, usually as a consequence of "committing to the bit." Sometimes it seems like he has lost the plot, other times that he has found it. But the books are extremely readable.