True NL beginner with elementary questions

[Bona]

I am a real neophyte at NL, having played only about 400 hands. I am not new to poker. I play limit and live limit poker quite a lot.

I am starting to learn NL at lowest possible stakes. I have read some, lurked some, and want to better understand a few elementary concepts. I intend to post a few hands with my thought process so any of you who are willing to take the trouble can correct either my play or my thinking or both. BTW I am taking the advice of a fellow 2'r and only buying in 100BB while I am playing with training wheels.

These two hands are pretty elementary I think. This first I usually don't play in limit but I felt like in NL I probably have enough implied odds to see the flop and play it fit or fold. What do you do with it?


PokerStars No-Limit Hold'em, $0.02 BB (9 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

SB ($4.98)
BB ($6.11)
<font color="#C00000">UTG ($1.99)</font>
<font color="#C00000">UTG+1 ($3.15)</font>
Hero ($2.49)
MP2 ($5.18)
MP3 ($2.86)
CO ($3.81)
Button ($0.72)

Preflop: Hero is MP1 with 3[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/diamond.gif[/img].
UTG calls $0.02, <font color="#CC3333">UTG+1 raises to $0.04</font>, Hero calls $0.04, <font color="#666666">3 folds</font>, <font color="#CC3333">Button raises to $0.12</font>, <font color="#666666">2 folds</font>, UTG calls $0.10, UTG+1 calls $0.08, Hero calls $0.08.

Flop: ($0.51) 4[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">UTG bets $0.1</font>, UTG+1 calls $0.10, Hero folds



This hand is also about hand selection but also about bet sizing strategy.
My default preflop bet size is 4XBB sometimes plus with limpers. My position is good with this hand even though the hand is marginal so preflop I wanted to get HU with the limper. On the flop I thought I was ahead but very vulnerable so I attempted to take it down there. What say you?

PokerStars No-Limit Hold'em, $0.02 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

saw flop|[color=#C00000]saw showdown</font>

MP2 ($4.97)
CO ($2.51)
Hero ($2.32)
SB ($5.13)
BB ($3.25)
UTG ($3.68)
MP1 ($0.50)

Preflop: Hero is Button with , .
[color=#666666]3 folds</font>, CO calls $0.02, [color=#CC3333]Hero raises to $0.1</font>, [color=#666666]1 fold</font>, BB calls $0.08, CO calls $0.08.

Flop: ($0.31) , , [color=#0000FF](3 players)</font>
BB checks, CO checks, [color=#CC3333]Hero bets $0.3</font>

Thanks in advance for your comments.