In Cricket Championship you can follow the progress of your team's matches by following the commentary and/or the scorecard. To view the current match for your team use the Current option on your team's Matches page. Additionally your team's current, or last, match is linked from the top menu. Commentary and scorecard pages are updated automatically at the end of every over.
You can only change tactics during a two innings match.
You can change many of the tactic settings and team selection settings during a match but your changes will only take effect at the start of the next session of play. If you change your declaration settings to suitable values you can declare during a break in play (whether during the day or overnight).