There are never any guarantees for a job whatsoever and no, there is not a looming pilot shortage. There are dozens of threads on this. FTO/FTU's use this as a marketing tool! We are still waiting for the shortage they started talking about 30years ago. The only shortage is or will be be captains on medium and heavy jets with thousands of pic hours on type as Asian and MENA carriers expand their widebody longhaul fleets rapidly.
Be smart with your money and how you spend it. Despite what the lazy ones will say, there are alternates to spending £20,000+ on a Type Rating, and spending that especially without a job offer is just a dumb move that will no doubt create a financial hardship for many years...unless daddy is rich, even then, it doesnt make it right