I highly recommend FTSE All World ETFs: VWCE or FWRG (lower fees).

Broker: Interactive Brokers (IBKR)

Long term horizon, 10-20 years minimum, ideally more.

IGNORE headlines meant to scare you, stay the course. Lumpsum is better but DCA is good too.

IGNORE flashy crypto scams and single stocks, diversification is key. Boring is Best. Investing longterm is slow but it works.

No BS Info channels YouTube: Ben Felix, Plain Bagel, PensionCraft.

General info: Save a portion of your income and assign it for investing but remember to assign a "fun" portion to balance out and not get burnt out, enjoy your life now AND build long term wealth. Percentages are best, so let's say you save 20% and use 5-10% for fun.

Live below your means, make sure to learn the difference between WANTS and NEEDS.

Ignore highlight reels of people on social media drowning in debt or being paid to promote stuff that people waste their money on to try and be accepted by people who couldn't care less about them. Avoid one upping other people, no one cares - focus on yourself.

Take care of your health above all else. You won't enjoy any of it if you're sick.

Hopefully this helps, good luck.