Yes it is good place to learn. You will find in this forum very experience User. Newbie can learn lot of skill and safe advice from Old members.
Diversify your fund and don't invest in one coin. Bitcoin and Eth should be included in your investment. Both are for long term.
30% for Luna,Sol,Dot,ADA and Avax.
Don't buy any coin which are not listed on binance. You are new to crypto so I recommend you to buy only those coins which already available on binance.

Though it was stated above that you shouldn't rely on other suggestions regarding financial advice but here's my opinion regarding your questions.

Since you're talking about investment in the long term, choose a project that has been proven, tested, decentralized, and very volatile that has fast-moving in the market.  IMO, Bitcoin is the first choice and as others said, this potentially will have profit in a long term.

These are my opinions,

• Always DYOR
• Don't trust a hype project
• Always prefer on the decentralized concept
• Have a real use project

You should diversify into bitcoin some of the top altcoins.
Actually, for long-term investment plans, it is preferable to read the fundamental factors well rather than the volatility performance. However, you can also analyze their charts in recent years based on historical price and marketcap volumes in conclusion.

$5000, just put it into bitcoin, eth & solana & forget about it until retirement age. You should make a lot of money that way but your capital isn’t enough to get rich short term. You are going to need to HODL for likely two decades.

Are you ready to lose this 5000$? If anything goes wrong can you move on and not be let down because of your money? This is why I warn newbies not to use money that they can't afford to lose on crypto investment, since you are knew to crypto BTC is the best one to start with.

Are you ready to lose this 5000$? If anything goes wrong can you move on and not be let down because of your money? This is why I warn newbies not to use money that they can't afford to lose on crypto investment, since you are knew to crypto BTC is the best one to start with.

We cannot give proper financial advises. You should not invest based on random people's advises. You should learn and understand what you're doing.
Also you're on a bitcoin and crypto forum, hence people will tell you why crypto is great Just, again, make your own decision when investing.

Now to your questions. For newbies Bitcoin is basically the only proper solution because it's the least risky. But keep in mind, all crypto investments are risky. I cannot promise you that you'll be on profit in a week or a year from now. That's why one rule is to invest only money you afford to lose or keep locked for long time.
Historically an investment in Bitcoin was on profit in max 4 years. But Bitcoin is still young and history doesn't mean that much.

On the other hand, altcoins promise great profit, but on very long time they usually disappoint (compared to bitcoin). Also it's difficult to find really profitable ones, even for rather short periods.

So with Bitcoin you also avoid scam coins, as long as you are careful to get actual Bitcoin and not Bitcoin cash, bitcoin gold, wrapped bitcoin on ethereum network and other things with bitcoin in their name.

Three final advises:
1. Make sure you buy from established and reputable platforms to minimize the chances to get scammed.
2. Take a close look at the platform requirements and fees, especially at the KYC requirements (if it's a KYC platform and you are OK to give your details, you may want to pass the entire process before your money is locked in there for whatever problems) and the trade and withdrawal fees.
3. Make sure you read and understand how to hold your coins safely. You may want to acquire a hardware wallet for your coins. Crypto is very easy to be stolen. Also keep in mind to always double check thoroughly the addresses you send/withdraw coins to (because copy/paste viruses can easily trick you into sending money to scammers).

I hope that this is informative for you and I didn't scare you too much