I can understand your thinking.
In the early days after your ppl all sorts of fears creap in.
Here is my take.
1. A ballistic chute is a very good idea for a IFR capable touring aircraft. There are occasions if you are going to fly in all weather over rugged terrain where a BC can be a life saver - low cloudbase, night, terrain with no suitable landing area etc.
2. Realistically you will never get approval to fit one to a certified aircraft - so whilst in theory a very good idea - forget it. In Euro land it is a major mod and if you went down this road there will be no change out of £50K - maybe more! In any event you are far better off buying an aircraft with one fitted when and if your needs demand (see above)
3. Nearly all fatal accidents are due to pilot error and most occur in the circuit (where a chute may be of little benefit anyway). The other common reasons, CFIT and loss of control in IMC, are both avoidable.
4. In short in a well maintained aircraft if you exclude pilot error you would have to be very unlucky indeed to suffer a fatal accident for other reasons.
5. In a SEP loss of an engine is a small risk. In the majority of cases a forced landing (even if you had a chute fitted) is the best way down but pilots do not practise FL enough.
In short invest your money in the best maintenance you can, keep on investing in training until you are happy you can cope with almost anything you are likely to enounter, buy an aircraft when you are ready with as low a time engine as you can afford, learn how to fly as defensively as possible - you be glad you spent your money in this way rather than in any other.