<human>: To keep it short, I'm 26, pursuing my PhD (no room for saving) and currently have 2500 Euro worth of debt. 

I will receive 10,000 Euro worth of inheritance in the coming months and since I've never had that much money before, and its too small to buy anything lavish with it I'd like to use it as a starting point for some kind investment savings account or similar. I don't have a clue about investments and normally would research the topic but I don't really have time and I've subscribed to this subreddit since joining and have always enjoyed reading everyones feed back to problems posted. 

The reason why I want to use the remaining 7500 Euro for investment is because in the next 12-18 months I will be finished with my PhD and my salary will jump *considerably* (provided I land a job), which means I can begin saving and investing monthly, but this could give me a nice head start. 

From what I've read so far, it seems Index funds are my way to go, and I've read that Vanguard is the way to do it, could any of you experts offer advice on the topic? 

For general information, I can have a bank account in either Ireland, the UK or Germany (if currency comes into account, I think British pounds might give me an advantage).

Can you condense the text into three sentences or less?
<bot>: Will have 7500 Euro which I would like to use to begin investing, I will then use this as the basis for a long term investment savings account. Need help on where to start