Hi K.,
PLEASE do not place your little one in the forward facing position....there is a way to get your seat properly installed...see the link below as to why children underthe age of 2 should all be in the rear facing position, my daughter stayed rearfacing until age 3 1/2 and 33 pounds and my son who will be 2 tomorrow is still rearfacing and will continue to be because it is SO MUCH SAFER and to have him forward facing is against the law (the new recommendations by safety experts and the American Academy of Pediatrics is to rear face well past the old rule of 1 year AND 20 pounds based on the new crash tests that show how rear facing is so much safer and protects the little ones head and neck in a crash)
That being said...can you post what type of convertible seat you have and what type of vehicle you have...I'm a regular on a great carseat board and may be able to help you out...if you also call the local Police or fire dept. and explain your problem with the installation they will be able to help.
Other moms have given you great ideas for a good seat...some are better than others out there and it's always a good idea to try seats out in your vehicle as not all seats fit that well in all cars. When buying a convertible you really have to look at as an investment in the most important thing in your life...a decent convertible seat will last you at least 3-4 years...I have a Britax Marathon for both my kids, my daughter has been in it since age 6 months, she'll be 5 in June and still has about a year left in it. The Evenflo Triumph Advance for about 150 is another good choice as it harnesses to 50 pounds (avoid seats that only harness to 40 pounds as the harness slots tend to be very low and you will end up needing a new seat sooner than later...also avoid the Eddie Bauer seat that says it'll be the only seat you need....it isn't and most will tell you it's a terrible seat, just well marketed.
Feel free to email me with specific questions..when I was first starting out I never knew there were so many choices and important facts to learn about car safety.
B.