Before you do anything with that money, it would be wise to educate yourself on the various investment vehicles along with their associated advantages/disadvantages. Do you have a means of income other than this 800k? Do you have any other money than the 800k? The answer those two questions will weigh heavily into how you allocate the money.
I'm not sure what you're asking in regards to your question about banking. Don't take investment advice from a banker. They have a vested interest in being profitable (not that there's anything wrong with that) which *will* create conflicts when it comes to their investment recommendations.
If you're not willing to self-educate and learn to mange the money yourself, another option would be go find a financial planner that's truly a fiduciary and work with them to allocate the capital. IFA (Index Fund Advisors -
https://www.ifa.com) is well respected in the industry. They can manage your money for you by putting it into low-cost index funds as well as automatically rebalance the portfolio as they see fit. Granted they're going to charge you a fee for doing this (anywhere from .25 - 1% of AUM annually).
Finally, it's important to realize that while 800k sounds like a lot of money, it will only produce somewhere between 22 - 26k per year in dividend income. So be sure to evaluate your cost of living before embarking on your trip to sail around the world. The only thing worse than not retiring early, is having to return to work after having retired because you didn't accurately calculate your living expenses.
Were it me and I was looking for very simple and inexpensive asset allocation that I could set and not look at for the next 20 or so years, I'd put 50% of the money into VTI, 35% into VEA and 15% into VWO. That covers the entire US stock market as well as both the developed and emerging international markets. Short of the world coming to an end, that's an asset allocation that will do well over time because you own practically everything worth owning. That lazy asset allocation would work for me based on
my tolerance for market volatility.
The best thing for you to do would be to spend the next few months getting educated on investing while you wait for this money to come in later this year.
Hope this helps.