Some suggestions based on the first game

.

- You simply have to block at R16. If you play there, you get a fairly strong grip on the territory in the corner, and black is still unsettled so he has to play another move on the side. When black plays there on move 11, suddenly it is him who has the corner territory and the settled shape, while yours is still unsettled.

- This is a gote endgame move, too small to play right now.

- Even smaller than

. Think about how many points you gain by playing here vs if black had played here. Black was sensible and ignored your move and played elsewhere.
Overall, my recommendation based on the first game would be to work on your sense of big moves.

at R16 was a big move because it decided who got the corner and also who got the stronger of the two groups, whereas

and

neither affect the safety of any groups nor secure much territory.