Is there a way to upgrade a Pentium II without no problems?

Im tring to upgrade a pentium II now i know its old and more like garbage but i got some spare parts that can make the pc run better is it worth it ?? The motherboard is old but has 4 pci and 2 agp slots. Its origanlly a Hp pavilion. And i think it uses pc x100 ram i think lol very ancient..