Progress in Chess

My chess in tab is going fine. I play Level 4.
On an average, I loose 3 games, win 1 game and 2 games are near draw level. Out of 6 games I play.
Earlier, I made the following mistakes (possibly initial mistakes of new players):

1. Did not defend pawns. With pieces like knight, bishop etc.
2. Tried to attack hoping things will happen. Or tab will make a mistake. I directed my game stupidly towards this attack.
3. Made unnecessary moves.
4. Resigned while in end game with few pieces. (Even now I do it). It requires great calculations which I find difficult.

My plans for future are:

1. Not make above mistakes.
2. Develop patience.
3. Make openings to centre and beyond boldly. to centres