Depending on what what chemo is recommended, as @kmakm says, outcomes are really variable and you can’t know precisely how you will react until you start. Pig in a poke, but a necessary one. Assume hair loss, and have a think about scarves and/or wigs. Fatigue is a major potential impact - on how you feel, what you do. Not everyone gets fatigue, I didn’t. Nausea is also variable from mild to severe, or in my case, none again. Anti nausea drugs can help. The first two or three weeks usually set the pattern, although fatigue can be cumulative - there is also a build up of just being tired of the whole thing! I found keeping doing normal things helped immensely, but it does all depend on how you physically react. Physical reaction may also impact your emotional state. You can certainly over-think, or at least think too far ahead. Focusing on Immediate future only may be hard, but it’s a lot better than imagining all sorts of potentially dire things that may never happen. Now is the time to focus on your wellbeing, let go (at least temporarily) things that don’t build your optimism and strength. Very best wishes.