O.k., so the house just went into probate and your sister is the executor. That puts her in the driver's seat and she largely controls the timing of how things go. A lot is going to depend on what other assets the estate has and what debts it owes. As executor she has a responsibility to ensure that the estate bills are paid, and that means the estate has to hold on to sufficient assets to make sure all those bills get paid. That includes burial and funeral expenses, taxes, any medical bills your father had, debts he owed, etc. That usually takes a least several months to contact all the potential creditors, get proofs of claim, pay the bills, etc.
Once that is all sorted out she can distribute the assets. If she drags her feet too much in doing this stuff you can sue her to compel her to get things done, but that's going to cost you money in legal fees, court costs, etc.
Once the distribution is done, if you and your sister end up co-owners of the house, you'll need to either get her to buy out your share or cooperate in selling the property to get your money out of it. You can't legally force her to do either one of those things. What you can do is seek what the law calls a partition of the property. That would result in a court ordered sale of the property. In addition to the legal fees and costs you have in doing that, the home is likely to sell for significantly less at a partition sale than in a regular voluntary sale that you and your sister would do. In short, you might end up with a lot less in your pocket in the end by doing that. And it won't be a fast process.