As Karl says, reverse DNS (PTR records) are typically handled by your server provider. You will be responsible for the forward records. Sites like DNSStuff (www.dnsstuff.com) can provide you with some DNS diagnostics. There are similar sites that are free but I don’t have a list handy.
In terms of management, you may want to consider finding a server management company. Many companies provide both subscription based and hourly support basis. As a new dedicated server owner, I highly recommend you know who to call, their procedures, capabilities and rates before a critical issue arises.
I’ve seen many issues escalate into major outages because new servers owners did not have the right support team behind them. I’ve seen some un-managed server providers make matters worse because their staff is not well trained for system administration.
I have 2 dedicated servers and i dont have a clue on how they even work i have a guy who only specialises in servers and has been doing it for years and only charges from $15 per server per months to manage them its just not worth me loosing sleep over it,he has a direct IM and email solely for contacting if you have any problems.
The guy name is Jamie and his contact details are in my signature i wont allow anyone to go near my servers except him.
If you’re new to managing a server, I would suggest looking into getting a control panel installed. Most dedicated hosting providers will offer this at an additional fee, however, a control panel can definitely help with the learning curve.
You can also enlist the services of a server management company. They are usually pretty affordable and can assist you with most of the changes you wish to make on the server. This solution allows you to focus on other things while you have expert eyes and handles to manage the server.
Control panel recommendations are either cPanel or Plesk. As for server management, I would check out Platinum Server Management.
Also, for any new cpanel account you create with WHM, the DNS should already be configured for you. Usually, you do not have to edit the DNS, unless you have specific changes needed to be done for a certain domain name.
Reverse DNS pointers will in 99.9% of cases need to be setup by the company that you rent the server from - it’s not something you usually setup from your server, it’s handled by their own authoritative DNS servers for the IPs.