"Our meetings are too long" "Meeting attendance sucks" "We're not on the same page" "We aren't testing" ... So what? These are observations. Why are these problems?
"We're too slow" "Our code has too many bugs" ... Do you have data? Do you have a target value? If not, how do you know you have a problem?
"We need to meet more" "We need to test more" "We need to communicate more" ... ... and you know you should eat better and exercise more Don't fix symptoms. Address causes
Start with specific examples where things could have gone better Do a root cause analysis or 5 Whys Analysis of that example Find the easiest to fix link in the causal chain
Agile is a toolbox of lightweight solutions to common development problems A starter list of agile ideas Choose the simplest tool that is relevant to the root problem.
Baseline: record the metrics you are using as evidence of a problem Do the new process Measure: record the metrics Better? If yes, has something else gotten worse? If no, is the process not working, or are you not doing the process?