The sg initially was right on 1.100,when I racked it to secondary fermentation it was 1.00. Tells me fermentation is going really well
What container were you using for primary fermentation? Does it have a lid that seals or was it just open top? Also, how much time was it between when you first started seeing fermentation to when you racked to secondary? A few days? A week?
Normally if fermentation is going strong, there is no need to move the wine- regardless of container. Once fermentation has slowed down you can rack to a ssecondary container (like a big mouth bubbler, or carboy with sufficient head space). Or if your primary container has a lid that seals and has an airlock hole, you can shut it and put in an airlock.
Note that as long as you see bubbling through an airlock, the wine is off gassing and creating a layer of CO2 that will protect it. Even if you have a lid on that blocks air from coming in but allows the CO2 out, it will likely be good enough for the first 7 to 10 days in primary.
Many people on this forum use 8 gallon buckets with lids that have gaskets for primary. It makes the process easier as you can leave the wine in the bucket until fermentation has completed.
Bryan's advice for waiting to add oak is spot on. You'll learn that winemaking is a patient process. Finishing oak can be added at any point after fermentation but most people tend to wait until they have racked off the gross less and the wine is ready to age in a carboy for a few months to a year. Many people will rack their wines a few times during the aging process to help remove sediment as it falls. The longer the wine sits, typically the more sediment will naturally fall out of suspension. Fining agents (K&C) will also help drop sediment.
My personal process is primary for 2 weeks minimum (in a sealed bucket under airlock), transfer to carboy (removes gross lees), leave it for 1 to 2 months before racking to new carboy. After that, the wine will spend around 6 to 12 months in that carboy. The only thing I do is add kmeta at each racking and on a 3 month schedule. I let nature do the fining and skip the K&C. I use a vacuum pump for transfers and I filter the wine at bottling. The vacuum pump also helps remove C02. Oak can be added at any point along the way.
Edit... I'm making some assumptions in my mind. I assumed you're making wine from a kit. If this is not the case, some of what I'm suggesting may not be the best advice for you. Good luck!