just pick a good bond and invest all your money there (since they're fairly low risk)
No. That is basically throwing away your money and why would you do that. And who told you they are low risk. That is a very wrong premise.
What factors should I consider in picking a bond and how would they weigh against each other?
Quite a number of them to say, assuming these aren't government bonds(US, UK etc)
How safe is the institution issuing the bond. Their income, business
they are in, their past performance business wise and the bonds
issued by them, if any. Check for the bond ratings issued by the rating agencies.
Read the prospectus and check for any specific conditions i.e. bonds
are callable, bonds can be retired under certain conditions, what
happens if they default and what order will you be reimbursed(senior
debt take priority).
Where are interest rates heading, which will decide the price you are
paying for the bond. And also the yield you will derive from the bond.
How do you intend to invest the income, coupon, you will derive from the bonds.
What is your time horizon to invest in bonds and similarly the bond's life.
I have invested in stocks previously but realized that it isn't for me
Bonds are much more difficult than equities. Stick to government bonds if you can, but they don't generate much income, considering the low interest rates environment. Now that QE is over you might expect interest rates to rise, but you can only wait. Or go for bonds from stable companies i.e. GE, Walmart. And no I am not saying you buy their bonds in any imaginable way.