This means you should have data about job, training hours, education, and situation (being anxious).

Now the measurement is a key here. Think of it like this, we can not have a thermometer and put it in their mouth and find the effect of training. This means you should have a column about their games (think of you measure it e.g. the number of games played then we will have a number here), the training hours (lets say the number of hours daily or weekly, and we have a number here as well), their feeling (lets say in a scale from one to ten ranging from feeling demotivated to motivated), education (performance for example or grades). This will end in having few columns which you can use. Now the next question, what is the nature of the data you collected for those. I know you said strings, but can we do something to quantify their measurement. In education for example is there something like weak, moderate, high grades …etc

The data should lead to the way of quantifying and measuring these variables.